ライフサイエンスコーパス: cyclohexadiene

1 ) ((Dip)Nacnac), Et ((Dep)Nacnac)) using 1,3-cyclohexadiene.

2 erric iron hydroxides in the presence of 1,4-cyclohexadiene.

3 inylcyclobutene almost completely yields 1,3-cyclohexadiene.

4 yield) by thermolysis of (i)Pr(2)NPA in 1,3-cyclohexadiene.

5 asuring the kinetics of rearrangement in 1,4-cyclohexadiene.

6 nvolve quinones, hydrazines, thiols, and 1,3-cyclohexadiene.

7 earlier for reactions starting with 1,4-d(2)-cyclohexadiene.

8 lace of benzene the nonaromatic analogue 1,3 cyclohexadiene.

9 utilized and produce mixtures of trienes and cyclohexadienes.

10 lyzed cycloisomerization of siloxy enynes to cyclohexadienes.

11 range of highly functionalized 1,4- and 1,3-cyclohexadienes.

12 CBS-QB3 methods for the dimerization of 1,3-cyclohexadiene (1) reveal several highly competitive con

13 hydrogen abstraction from reaction with 1,4-cyclohexadiene (1,4-CHD) and (ii) the observation of 1,4

14 1 equiv of I2 in the presence of excess 1,4-cyclohexadiene (1,4-CHD) radical trap rapidly and near-q

15 nediynes or in their solutions in 10.6 M 1,4-cyclohexadiene (1,4-CHD)) strongly overestimate the reac

16 1,4-phenylenediamine (I) and bis(10-(2-((2,5-cyclohexadiene-1,4-diylidene)dimalonitrile))decyl) disul

17 SAM on silver (or gold) was bis(20-(2-((2,5-cyclohexadiene-1,4-diylidene)dimalonitrile))decyl)) disu

18 ic pathway in which 2-succinyl-6-hydroxy-2,4-cyclohexadiene-1-carboxylate (SHCHC) is converted to 4-(

19 release 2-succinyl-5-enolpyruvyl-6-hydroxy-3-cyclohexadiene-1-carboxylate and carbon dioxide.

20 dration reaction of 2-succinyl-6-hydroxy-2,4-cyclohexadiene-1-carboxylate but also an accidental race

21 pendent 2-succinyl-5-enolpyruvyl-6-hydroxy-3-cyclohexadiene-1-carboxylate synthase (MenD).

22 enzyme 2-succinyl-5-enolpyruvyl-6-hydroxy-3-cyclohexadiene-1-carboxylate synthase, or MenD, catalyze

23 ile the other, which forms 1-hydroperoxy-2,4-cyclohexadiene (18), passes through the same diradical i

24 nic dehydration of 2-succinyl-6R-hydroxy-2,4-cyclohexadiene-1R-carboxylate (SHCHC) to 4-(2'-carboxylp

25 Although 1,4-cyclohexadienes 2, obtained through the Birch reduction

26 , abstracts H atoms from weak C-H bonds (1,4-cyclohexadiene, 2,4,6-(t)Bu3C6H2OH) to afford ferrous am

27 obutadiene, 65; 1,2-cyclopentadiene, 51; 1,2-cyclohexadiene, 32; 1,2-cycloheptadiene, 14; 1,2-cyclooc

28 metalation affords cis-3,6-disubstituted 1,4-cyclohexadienes (46-84%).

29 dagger) = 8.8 kcal/mol) to 1-hydroperoxy-2,5-cyclohexadiene (5), while the other, which forms 1-hydro

30 e (4), semibullvalene (5), and 5-ethynyl-1,3-cyclohexadiene (6), and C(8)H(10) hydrocarbons bicyclo[3

31 l ligand (Lax), toward three substrates: 1,4-cyclohexadiene, 9,10-dihydroanthracene, and triphenyl ph

32 For 1,3-cyclohexadiene a single transition structure for the [1,

33 the first 1,3-dipolar cycloadditions of 1,2-cyclohexadiene, a rarely exploited strained allene.

34 hydride-cyclopentadiene and maleic anhydride-cyclohexadiene adducts was accomplished with high stereo

35 yloxy)-1-propene result in 5-substituted-1,3-cyclohexadienes after removal of the metal.

36 t those obtained from reaction of 1 with 1,4-cyclohexadiene, allowed formulation of a detailed mechan

37 ans-(DMPE)(2)Ru(H)(NH(2)) (1) dehydrogenates cyclohexadiene and 9,10-dihydroanthracene to yield benze

38 The poor reactivities of cyclohexadiene and cycloheptadiene with dienophiles that

39 ivatives (nitrile, acid, acid chloride) with cyclohexadiene and cyclopentadiene.

40 hout net epimerization, fragmentation to 1,3-cyclohexadiene and ethylene, migration to the original C

41 nate fluorene and reversibly deprotonate 1,3-cyclohexadiene and toluene.

42 these species also abstract H atoms from 1,4-cyclohexadiene and various phenol derivatives.

43 vestigations of (i)Pr2NPA thermolysis in 1,3-cyclohexadiene and/or benzene-d6 are consistent with a m

44 rotoluene complex, which was elaborated into cyclohexadienes and cyclohexenes with ee's ranging from

45 ss to highly functionalized cyclohexenes and cyclohexadienes and is orthogonal to existing chemical a

46 he Diels-Alder reactions of cyclopentadiene, cyclohexadiene, and cycloheptadiene with a series of die

47 major product formed in the presence of 1,4-cyclohexadiene, and is believed to result from hydrogen

48 and flexible sigma-cyclic, pi-acyclic carbo-cyclohexadienes, and to "pro-aromatic" congeners, i.e. r

49 e demetalation with silver triflate, cis-1,4 cyclohexadienes are formed in yields ranging from 16 to

50 different solvents produced an intermediate cyclohexadiene as evidenced by UV/vis, IR, and 1H NMR sp

51 symmetrization and kinetic resolution of 1,4-cyclohexadienes by the chiral dioxirane was also found t

52 iving first the carbene and then coordinated cyclohexadiene, C5 giving carbene, then diene, and then

53 Although 1 oxidized PPh(3) and 1,4-cyclohexadiene catalytically, it did not epoxidize olefi

54 Hydrogen atom abstraction (HAA) from 1,4-cyclohexadiene (CD-H) by (dtbpe)Ni(NAr) to form a Ni(I)-

55 ular dynamics simulations of one and two 1,3-cyclohexadiene (CHD) molecule(s) reacting with the Si(10

56 was found to transfer P2 efficiently to 1,3-cyclohexadiene (CHD), 1,3-butadiene (BD), and (C2H4)Pt(P

57 fin-cyclopentadiene (CpH), cyclopentene, 1,4-cyclohexadiene (CHD), or cyclohexene-showed that, with t

58 DbetaM; E.C. 1.14.17.1)/1-(2-aminoethyl)-1,4-cyclohexadiene (CHDEA) reaction partitions between side

59 xides and aziridines derived from homochiral cyclohexadiene cis-diols.

60 ly formed by transfer hydrogenation from 1,4-cyclohexadiene (commonly included in such reactions), th

61 Kinetic studies, as a function of 1,4-cyclohexadiene concentration, revealed retro-Bergman rin

62 solution cyclizations in the presence of 1,4-cyclohexadiene confirmed C(1)-C(6) Bergman cyclization.

63 ic extrusion of the titanium center delivers cyclohexadiene-containing products, while several distin

64 1,5] hydrogen shifts in 1,3-cycloalkadienes (cyclohexadiene, cycloheptadiene, and cyclooctadiene).

65 Photooxygenation of a cyclohexadiene derivative gave a bicyclicendoperoxide, w

66 reaction attractive for a synthetic route to cyclohexadiene derivatives from alkynes.

67 sen was utilized to access 4-substituted-3,5-cyclohexadiene diol derivatives, which are valuable chir

68 The radical traps TEMPO and 1,4-cyclohexadiene do not inhibit the formation of 3; howeve

69 follows a stepwise diradical pathway to form cyclohexadiene endoperoxide with an activation barrier o

70 l during the intramolecular coupling between cyclohexadiene--Fe(CO)(3) complexes and pendant alkenes

71 pproach to a wide range of highy substituted cyclohexadienes for many subsequent synthetic applicatio

72 PF6)2 oxidizes 9,10-dihydroanthracene or 1,4-cyclohexadiene forming the terminal hydroselenide, [Ni(M

73 synthesis of the dihydrocatechol 1 from 1,3-cyclohexadiene has also been developed.

74 y of the reaction of singlet oxygen with 1,3-cyclohexadiene has been made at the B3LYP/6-31G(d) and C

75 the three possible monodeuterium-labeled 1,3-cyclohexadienes have been followed in the gas phase at t

76 o be a synthetic precursor to functionalized cyclohexadienes: In solution, it selectively protonates

77 tion occurs via a hydrogen transfer from the cyclohexadiene intermediate to the maleimide derivative

78 Cyclohexadiene intermediates were not observed but were

79 d electrocyclic ring-opening reaction of 1,3-cyclohexadiene is a fundamental prototype of photochemic

80 1,2-Cyclohexadiene is generated in situ under mild condition

81 n contrast, the ring-opening reaction of 1,3-cyclohexadiene is shown to result in hot structures with

82 phile but not with the weak C-H bonds in 1,4-cyclohexadiene, it is proposed that the C-H cleavage occ

83 Similar experiments show that 1,3-cyclohexadiene likely reacts with P-nitroso phosphine ox

84 leophilic, oxidizable substrates such as 1,4-cyclohexadiene (M = Cu; 55%); however, in the presence o

85 oligomers and polymer resembles that of poly(cyclohexadiene) more than poly(p-phenylene).

86 nts indicate that reaction between 5 and 1,4-cyclohexadiene occurs with a rate constant of approximat

87 drogenative cycloadditions of 1,2-diols with cyclohexadiene or norbornadiene are described.

88 ntation of the arenophile moiety affords 1,3-cyclohexadienes or 1,4-diaminocyclohex-2-enes, compounds

89 l %) at ambient temperature to afford siloxy cyclohexadienes or the corresponding 1,2- and 1,3-cycloh

90 orobenzoquinone over its para-isomer and 1,3-cyclohexadiene over its 1,4-isomer, perhaps hinting at t

91 des to benzene gives the 3-(hydroxyaryl)-1,4-cyclohexadienes, predominantly.

92 *)(+), proceeds by a stepwise pathway to the cyclohexadiene product with an overall exothermicity of

93 reated as fleeting intermediates en route to cyclohexadiene products formed by formal cheletropic ext

94 of hexatriene radical cation 1(*)(+) to 1,3-cyclohexadiene radical cation 2(*)(+) was studied comput

95 mido aryl ortho isopropyl group, or from 1,4-cyclohexadiene, respectively.

96 ic ring of the phenylethylamine substrate or cyclohexadiene ring of CHDEA.

97 rs, (C(6)H(6))(2), all featuring one or more cyclohexadiene rings trans-fused to 4- or 6-membered rin

98 ydrazine (S3), p-methoxyphenol (S4), and 1,4-cyclohexadiene (S5).

99 Unsaturated terpenes having a cyclohexadiene structure (e.g. terpinene) and minor cycl

100 olefin and sulfide sites as well as oxidize cyclohexadiene substrates to benzene in a formal H2-tran

101 Trapping experiments using 1,4-cyclohexadiene support the intermediacy of an aromatic d

102 e of toluene for anisole, 1,3-butadiene, 1,3-cyclohexadiene, thiophenes, pyrroles, or furans resulted

103 th the faster rate of HAT from indene versus cyclohexadiene, this trend is consistent with H(+) trans

104 om xanthene, 9,10-dihydroanthracene, and 1,4-cyclohexadiene to Cp(CO)2Os(*) and (eta(5)-(i)Pr4C5H)(CO

105 ymmetric P-nitrosophosphate reacted with 1,3-cyclohexadiene to form a mixture of diastereomeric cyclo

106 a H-atom abstraction (HAA) reaction with 1,4-cyclohexadiene to give the diamagnetic FLP-NOH product 3

107 ol, including 9,10-dihydroanthracene and 1,4-cyclohexadiene to produce [M(II)H(3)1(OH)](2-) and the a

108 rgoes a H-atom abstraction reaction with 1,4-cyclohexadiene to yield the respective diamagnetic FLP-N

109 ith the commercially available 1-methoxy-1,3-cyclohexadiene to yield the resultant tetra-ortho-substi

110 f the title compounds in the presence of 1,4-cyclohexadiene trap led to the formation of respective t

111 provide functionalized cycloheptadienes and cyclohexadienes upon electrophilic capture.

112 lyzed Diels-Alder reaction of indole and 1,3-cyclohexadiene was studied by a combination of experimen

113 When hydrogen abstraction from 1,4-cyclohexadiene was studied in the presence of LiClO(4) a

114 for reaction of 5 with diethylamine and 1,3-cyclohexadiene were determined to be (1.3 +/- 0.5) x 10(

115 concentrations of external H-atom donor (1,4-cyclohexadiene) were performed to gain further insight i

116 facile electrocyclic ring closure to form a cyclohexadiene, which goes on to form anilines with a hi

117 ther comparable to or more reactive than 1,4-cyclohexadiene, which is one of the most reactive substr

118 Anisole was also reduced to 1-methoxy-1,4-cyclohexadiene with 2.5 Li/mol of anisole.

119 ient triplet state photocycloaddition to 1,4-cyclohexadiene with formation of 1,5-diaryl substituted

120 ene (CpH), cyclopentene (c-C(5)H(8)) and 1,4-cyclohexadiene, with intriguing selectivity.