Fluoride ion promoted reactions of .alpha.-halo silanes: synthesis of stilbenes, epoxides, cyclopropanes, benzazepines, and phthalidylisoquinolines
摘要:
Reaction of alpha-halo silanes 1 with CsF in DMF affords stilbenes 5. In the presence of added aldehydes, epoxides 6 are obtained, while with electron-deficient olefins the corresponding cyclopropanes 7 are formed. A similar reaction of 1a with iminium compounds 8 in HMPA leads to 2-phenyl-3-benzazepines 12, whereas 1b or 17 furnishes phthalidylisoquinolines 15.
Synthesis of Functionalized Benzylsilanes from Arylzinc Compounds and (Iodomethyl)trimethylsilane by Means of a Novel Rh Catalysis
摘要:
[GRAPHICS]The catalytic activity of a Rh complex in cross-coupling between ArZnI and TMSCH2I was examined in which the Rh complex, generated in situ from [RhCl(1,5-cyclooctadiene)](2) and 1,1'-bis(diphenylphosphino)ferrocene, exhibited excellent catalytic activity for the production of various functionalized benzylsilanes in good yields. From P-31 NMR studies of various solutions containing several of the reaction components, confirmation of the rapid and quantitative transfer of aryl groups from ArZnI to the Rh complex to form arylrhodium species was ascertained. A catalytic cycle, commencing with the transmetalation, was thus proposed for the reaction.
A NEW FLUORIDE ANION-PROMOTED 1,4-CYCLOADDITION LEADING TO SYNTHESIS OF α-TETRALONES
作者:Masahiro Aono、Yoshiyasu Terao、Kazuo Achiwa
DOI:10.1246/cl.1985.339
日期:1985.3.5
Fluoride anion-promoted 1,4-cycloaddition of methyl o-trimethylsilylmethylbenzoate to conjugated olefins was found to give α-tetralones and uncyclized Michael adducts in moderate yields.
Kessar, Satinder V.; Singh, Paramjit; Venugopal, D., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1987, vol. 26, # 1-12, p. 605 - 606
作者:Kessar, Satinder V.、Singh, Paramjit、Venugopal, D.
DOI:——
日期:——
An Efficient Approach to the Synthesis of 1,3-Diaryl-1,2,3,4-[4H]-tetrahydronaphthalene-2-carboxylic Acids
作者:Jia-Ning Xiang、Ponnal Nambi、Eliot H. Ohlstein、John D. Elliott
DOI:10.1016/s0968-0896(98)00022-4
日期:1998.6
A flexible approach to the synthesis of endothelin receptor antagonists of the 1,3-diaryl-1,2,3,4-[4H]-tetrahydronaphthalene-2-carboxylic acid class is described. (C) 1998 Elsevier Science Ltd. All rights reserved.
AONO, MASAHIRO;TERAO, YOSHIYASU;ACHIWA, KAZUO, CHEM. LETT., 1985, N 3, 339-340
作者:AONO, MASAHIRO、TERAO, YOSHIYASU、ACHIWA, KAZUO
DOI:——
日期:——
Fluoride ion promoted reactions of .alpha.-halo silanes: synthesis of stilbenes, epoxides, cyclopropanes, benzazepines, and phthalidylisoquinolines
作者:Satinder V. Kessar、Paramjit Singh、Nachhattar Pal Kaur、Usha Chawla、Kalpana Shukla、Punam Aggarwal、D. Venugopal
DOI:10.1021/jo00012a024
日期:1991.6
Reaction of alpha-halo silanes 1 with CsF in DMF affords stilbenes 5. In the presence of added aldehydes, epoxides 6 are obtained, while with electron-deficient olefins the corresponding cyclopropanes 7 are formed. A similar reaction of 1a with iminium compounds 8 in HMPA leads to 2-phenyl-3-benzazepines 12, whereas 1b or 17 furnishes phthalidylisoquinolines 15.