Synthesis and Properties of 1, 1-Dihalogenocycloprop[<i>b</i>]Anthracenes
作者:Paul M¨︁ller、Michel Rey
DOI:10.1002/hlca.19820650405
日期:1982.6.16
The synthesis of 1, 1-difluoro-1H-cycloprop[b]anthracene (3) is described. The key step of the synthesis is the cycloaddition of 1,2-dichloro-3,3-difluorocyclo-propene (6) to 2,3-dimethylidene-1,2,3,4-tetrahydronaphthalene (5). The 13C-NMR. spectrum of 3 is assigned on the grounds of C,F-coupling constants, selective H-decoupling and the resulting residual C,H-coupling. The 1, 1-dichloro derivative
描述了1,1-二氟-1 H-环丙[ b ]蒽(3)的合成。合成的关键步骤是将1,2-二氯-3,3-二氟环丙烯(6)环加成到2,3-二甲基-1,2,3,4-四氢萘(5)上。的13 C-NMR。基于C,F耦合常数,选择性的H型去耦合以及所产生的残留C,H耦合来分配3的光谱。1,1-二氯衍生物4是通过相同的途径合成的,但不能分离得到纯净的。还原为1 H-环丙[ b ]蒽(2)和电离的实验3或4到阳离子16失败。
Preparation of 3,4-Fused Cyclopropabenzenes and Cyclopropabenzenyl Cations
作者:Paul Müller、Domingo Rodriguez
DOI:10.1002/hlca.19860690704
日期:1986.10.29
series of 3,4-disubstituted (4a, b) or 3,4-fused (4c-e) 1,1-di-fluorocyclopropabenzenes, including the very strained 1,1-difluoro-3,4-dihydro-1 H-cyclobuta[a]cyclopropa[d]benzene (4e) have been synthesized and characterized. Dissolution of these difluoro derivatives in fluorosulfonic acid affords the fluoro cations 3a–e. 1H-, 19F-, and 13C-NMR data of the cations are reported and discussed with respect
一系列3,4-二取代(4a,b)或3,4-稠合(4c - e)1,1-二氟环丙苯,包括非常紧张的1,1-二氟-3,4-二氢-1 H合成并表征了-cyclobuta [ a ] cyclopropa [ d ]苯(4e)。这些二氟衍生物在氟磺酸中的溶解提供了氟阳离子3a – e。报告并讨论了关于前体的阳离子的1 H-,19 F-和13 C-NMR数据。
Synthesis of Cycloprop[<i>b</i>]anthracenes<i>via</i>Trapping of<i>o</i>-Naphthoquinodimethane
作者:Paul Müller、Domingo Rodriguez
DOI:10.1002/hlca.19830660820
日期:1983.12.14
Cycloprop[b]anthracenes 1, 1a, 1b are prepared in a 3-step synthesis starting from o-di(iodomethyl)benzene. The key step consists of trapping of o-naphthoquinodimethane (9) with 1,2-di- and tetrahalogenocyclopropenes (3, 3a, 4b).
从邻-二(碘甲基)苯开始,以三步合成法制备环丙[ b ]蒽1、1a,1b。的关键步骤包括捕获的ø -naphthoquinodimethane (9)与1,2-二-和tetrahalogenocyclopropenes (3,3A,4B) 。
Synthesis of Carbo- and Heterocyclic Cycloprop[<i>f</i>]indenes<i>via</i>cycloaddition of dienes to cyclopropenes
作者:Paul Müller、Zhongshan Miao
DOI:10.1002/hlca.19940770714
日期:1994.11.2
substituents at C(4) have been obtained via cycloaddition of 22b to 1-bromo-2-chlorocyclopropene. The key step of the sequence is a double Curtius degradation of the cycloadduct 23b to the ketone 27a. While aromatization of the alcohol 27b provided the cycloprop[f]indenol 28b, the reaction failed with 27a. Attempts to convert 28b to 1,3-dihydrocycloprop[f]indene (25) via the methanesulfonate 28d failed.
杂环环丙并[ ˚F ]茚19合成通过二烯环加成10到环丙烯11A和随后的碱诱导的芳构化。虽然19是可分离的,但寿命很短,但oxa类似物18在其制备所需的条件下会分解。杂环部分饱和的二氟衍生物14和15可通过环加成法获得,但是相应的二氯化物也不可分离。通过环加成获得C(4)上带有取代基的环丙[ f ]茚。22b为1-溴-2-氯环丙烯。该序列的关键步骤是环加合物23b到酮27a的两次Curtius降解。虽然醇27b的芳构化提供了环丙[ f ]茚满醇28b,但反应失败并变为27a。试图通过甲磺酸盐28d将28b转化为1,3-二氢环丙[ f ]茚(25)的尝试失败了。
Allylic Reactions of Benzocyclopropenes. Discrimination of halogen substituents in 1, 1-Dihalogenobenzocyclopropenes
Reaction of 1, 1-dichloro-2, 5-diphenylbenzocyclopropene (10a) with 1 equiv. of silver fluoride yields 1-chloro-1-fluoro-2, 5-diphenylbenzocyclopropene (10c). Both 10a and 10c react with excess silver fluoride to give the difluoro compound 10b. Both 10b and 10c are also prepared via cyclo-additions of 1, 2-dichloro-3, 3-difluorocyclopropene (14) or 1, 2, 3-flurocyclopropene (13) with diphenylbutadiene