ライフサイエンスコーパス: cyclopentene

1 pane which subsequently ring expanded to the cyclopentene.

2 selectivity is seen in the Heck coupling of cyclopentene.

3 henolysis of methyl oleate, cyclooctene, and cyclopentene.

4 le oxidation products of cyclopentadiene and cyclopentene.

5 -diacetoxy-3-pivaloxymethyl-4-(N-acetylamino)cyclopentene.

6 ereocontrolled preparation of trisubstituted cyclopentenes.

7 at the adjacent positions, into substituted cyclopentenes.

8 n of highly functionalized dihydrofurans and cyclopentenes.

9 dihydroxylation of appropriately substituted cyclopentenes.

10 ies that are readily cyclized to substituted cyclopentenes.

11 -diacetoxy-3-pivaloxymethyl-4-(N-acetylamino)cyclopentenes.

12 stems do rearrange photochemically to afford cyclopentenes.

13 able to show that oxidative cleavage of the cyclopentene 1,5-CH insertion product could be used to p

14 with a cyclic olefin-cyclopentadiene (CpH), cyclopentene, 1,4-cyclohexadiene (CHD), or cyclohexene-s

15 ymmetrization of prochiral 2,2-disubstituted cyclopentene-1,3-dione is catalyzed by a bifunctional te

16 was identified as 2,2,4-tribromo-5-hydroxy-4-cyclopentene-1,3-dione, which is an analogue to several

17 eviously described 2,2,4-trihalo-5-hydroxy-4-cyclopentene-1,3-diones in drinking water.

18 enacylbenzothiazolium bromides and prochiral cyclopentene-1,3-diones.

19 s in formation of certain compounds (e.g., 2-cyclopentene-1,4-dione) and a decrease in others (e.g.,

20 -amino-6-(cyclopropylamino)-9H-purin-9-yl]-2-cyclopentene-1-++ +metha nol.

21 (1R, 4S)-(+)-4-Amino-2-cyclopentene-1-carboxylic acid ((+)-3), (4R)-(-)-4-amino

22 -carboxylic acid ((+)-3), (4R)-(-)-4-amino-1-cyclopentene-1-carboxylic acid ((-)-4), and d, l-3-amino

23 ntiomers of 3 and 4 and d, l-trans-4-amino-2-cyclopentene-1-carboxylic acid (5), are competitive inhi

24 -carboxylic acid ((-)-4), and d, l-3-amino-1-cyclopentene-1-carboxylic acid (6) are good substrates.

25 The resulting cyclopentene (14) is stereoselectively hydrogenated to p

26 The enantiomerically pure cyclopentene 15 was generated from ketone 14 by alkylide

27 amyl alcohol, which provides the substituted cyclopentene 2a in 95% yield and with 97:3 regioselectiv

28 Cyclopentenes 3 and 4 were formed both kinetically (3:4

29 esized cyclopentylidenes 1 and 2, as well as cyclopentenes 3 and 4, as novel ring-contracted analogue

30 ring of the target, unexpectedly provided a cyclopentene (67%), which arises from participation of t

31 ions of 4-acetoxy-1-(N-hydroxyphenyacetamido)cyclopentene (8).

32 eospecific synthesis of suitably substituted cyclopentenes, 8 and 10, as surrogates for either the L-

33 The corresponding cyclopentene analogues were previously reported to be in

34 Unlike the cyclopentene analogues, there appears to be sufficient r

35 ently reported Co-catalyzed reaction between cyclopentene and 1-phenyl-1-propyne.

36 st of chiral derivatives of cyclopentane and cyclopentene and a chiral carbocyclic phosphonate.

37 arbonate display near planarity of the fused cyclopentene and benzene rings.

38 ere shown to prevent alkene isomerization in cyclopentene and cycloheptene starting materials.

39 embered cycloalkanones nucleophilically open cyclopentene and cyclohexene oxides in 57-76% yields and

40 acetoxy-substituted enyne-allenes, fused to cyclopentene and cyclohexene ring systems, were synthesi

41 ith binding energies of 57 and 62 kJ/mol for cyclopentene and cyclohexene, respectively, with transit

42 having barriers of 17.8 and 19.3 kJ/mol for cyclopentene and cyclohexene, respectively.

43 reaction for the synthesis of functionalized cyclopentenes and cyclohexenes is described.

44 Trifluoroacetoxylation of monosubstituted cyclopentenes and cyclohexenes proceeds with excellent r

45 lvent on the base-catalyzed isomerization of cyclopentene- and cyclohexene oxides.

46 eoselectivities of dihydroxylations of fused cyclopentenes are influenced by the conformational rigid

47 on a series of mono, di-, and trisubstituted cyclopentenes are reported in which trans-vicinal-additi

48 f 1 via aziridine opening of tosyl-activated cyclopentene aziridine 2 and optical resolution of racem

49 Nonsymmetric cyclopentene-based dithienylethenes, containing both thi

50 composed of bis(5-pyridyl-2-methyl-3-thienyl)cyclopentene (BPMTC) and tetrakis(4-carboxyphenyl)porphy

51 ds in cyclic olefins, cyclopentadiene (CpH), cyclopentene (c-C(5)H(8)) and 1,4-cyclohexadiene, with i

52 sulted in the formation of the corresponding cyclopentene-containing CH-insertion product in 62-69% y

53 on derivative 7a that has a relatively rigid cyclopentene core structure exhibits the strongest inhib

54 allylic and homoallylic amines (derived from cyclopentene, cyclohexene, and cycloheptene) have been i

55 te (PO.+ClO4(-)) added stereospecifically to cyclopentene, cyclohexene, cycloheptene, and 1,5-cyclooc

56 reactions between the ion 5 (m/z = 261) and cyclopentene, cyclohexene, cycloheptene, and cyclooctene

57 tion efficiencies for pi-ligand exchange for cyclopentene, cyclohexene, cycloheptene.

58 ano-2(E)-propenylcyclopropane [(+)-cis-1] to cyclopentenes definitively contraindicates the usefulnes

59 lobutene (DeltaE++ = 13.7 kcal/mol) than for cyclopentene (DeltaE++ = 12.1 kcal/mol), reflecting the

60 l4, the cyclopropane dicarboxylates afforded cyclopentene derivatives through ring opening followed b

61 ring replacement by chiral cyclopentane and cyclopentene derivatives, and phosphate replacement by p

62 of the intermediate epoxides are observed in cyclopentene-derived and cycloheptene-derived allylic am

63 g current and sample biasing conditions, the cyclopentene dissociation products are isolated and then

64 ibias STM and density functional theory, the cyclopentene dissociation products are shown to consist

65 presence of one or two methyl groups on the cyclopentene double bond, in comparison to the rate of t

66 opentenone) and symmetrical (cyclohexene and cyclopentene) ethene bridges.

67 the kinetic pathway accounted for the 93% of cyclopentene formation at 40 degrees C.

68 The synthesis began with 1-pyrrolidino-1-cyclopentene from which an intermediate possessing the t

69 provides access to cis-1,3,4-trisubstituted cyclopentenes from enals and chalcone derivatives with h

70 n, and turnover-limiting displacement of the cyclopentenes from palladium.

71 Several cyclopentene GABA analogues were synthesized as conforma

72 annulation products including trisubstituted cyclopentenes, gamma-lactams, and bicyclic beta-lactams.

73 atrices containing either cyclopentadiene or cyclopentene have led to the first observation of severa

74 the synthesis of several functionalized aryl cyclopentenes in good to excellent diastereoselectivitie

75 active, and allowed the synthesis of 1,2-BN-cyclopentenes in one step with good to excellent yields.

76 amined for the oxidative cleavage of the key cyclopentene intermediate and we found that RuCl3/NaIO4

77 ive vinylation that provides quick access to cyclopentene intermediates containing all of the carbons

78 Subsequent epoxidation of the cyclopentene moiety in 8 was accomplished by treatment o

79 suring the electrical properties of isolated cyclopentene molecules adsorbed to the degenerately p-ty

80 show that current-voltage curves on isolated cyclopentene molecules are reproducible and possess negl

81 Dissociation of individual cyclopentene molecules on the Si(100) surface is induced

82 The cyclopentene obtained from the PPh3-catalyzed reaction o

83 While demonstrated here for cyclopentene on Si(100), this feedback-controlled approa

84 ished that vinylcyclopropanes ring-expand to cyclopentenes on direct irradiation.

85 Furthermore, copolymerization of cyclopentene oxide (CPO) and CO2 was performed, resultin

86 via anti beta-elimination, as presumably do cyclopentene oxide and other epoxides.

87 Cyclopentene oxide instead undergoes alpha-elimination t

88 In HMPA, cyclopentene oxide undergoes beta-elimination.

89 omparison, the base-induced isomerization of cyclopentene oxide, which proceeds via alpha-elimination

90 ed to the stereoselective synthesis of spiro(cyclopentene)oxindoles with trisubstituted cyclopentene

91 ant A, vinylcyclopropane photoproduct B, and cyclopentene photoproduct C.

92 was determined that direct formation of the cyclopentene photoproduct proceeds more rapidly than the

93 anes and a subsequent mild vinylcyclopropane-cyclopentene rearrangement promoted by MgI(2).

94 rocyclic carbene-catalyzed vinylcyclopropane-cyclopentene rearrangement that involves a mutistep oxid

95 g followed by cyclization (vinylcyclopropane-cyclopentene rearrangement).

96 Further reaction of seleniranium 6 with cyclopentene resulted in further pi-ligand exchange givi

97 rbon double bond incorporated as part of the cyclopentene ring favors the formation of the correspond

98 The second plan deferred oxidation of the cyclopentene ring in 46 to a later stage of molecular co

99 , with two adjacent quarternary carbons in a cyclopentene ring, was accomplished in 13.5% overall yie

100 de precursor, epoxyqueuosine, to yield the Q cyclopentene ring.

101 ds in which the cis double bond is part of a cyclopentene ring.

102 Use of a stereospecifically deuterated cyclopentene substrate reveals that four of the five cat

103 The substituted cyclopentene substrates are derived from acylnitroso cyc

104 luoroborate (DMTSF)/NaN(3) with a variety of cyclopentene substrates has been carried out, and the ef

105 n-selective approach of electrophiles to the cyclopentene system.

106 th olefins has been developed that generates cyclopentenes that bear nitrogen-, phosphorus-, oxygen-,

107 yield), while ethenolysis of 10,000 equiv of cyclopentene to 1,6-heptadiene could be carried out with

108 Unusually, the digermyne also reacted with cyclopentene to give the same dehydroaromatization produ

109 n versus anti oxidative addition of 3-chloro-cyclopentene to Pd(0)L(n) was investigated using density

110 or skeletal reorganization that converts the cyclopentenes to the pentacyclic structures of the natur

111 kynyliodonium salt --> alkylidenecarbene --> cyclopentene transformation to convert a relatively simp

112 initiate an unexpected vinylcyclopropane --> cyclopentene type rearrangement, which occurs via a radi

113 on and in an analogue compound formed by two cyclopentene units linked by a norbornyl bridge, IET pro

114 o(cyclopentene)oxindoles with trisubstituted cyclopentene units.

115 These alkyne-tethered cyclopentenes upon [Au]/[Ag] catalysis lead to substitut

116 Allenoates and enones form cyclopentenes via a phosphine-catalyzed [3 + 2] cycloadd

117 Cyclopentene was shown to undergo efficient coupling und

118 The enantiomeric cyclopentenes were further elaborated to incorporate an

119 s provides 1,1-alkyne (aldehyde)-substituted cyclopentenes wherein enynals act as electrophiles.

120 partners can be employed, thereby generating cyclopentenes which bear a fully substituted stereocente

121 provide anti-1,4- and syn-1,4-disubstituted cyclopentenes while regenerating a hydroxamic acid moiet

122 of the highest occupied molecular orbital of cyclopentene with respect to the Fermi level of the sili

123 opentylethylene, as well as for 1-hexene and cyclopentene, yields of corresponding aziridines vary fr