Stereospecific approach to α,β-disubstituted nitroalkenes via coupling of α-bromonitroalkenes with boronic acids and terminal acetylenes
摘要:
(Z)-alpha-Bromo-beta-substituted nitroethylenes undergo facile Suzuki coupling with aryl, heteroaryl, and vinylboronic acids in the presence of Pd(PPh3)(4) as catalyst to afford (E)-alpha,beta-disubstituted nitroethylenes in high yield (up to 95%) and complete specificity. Similar coupling of alpha-bromonitroethylenes with terminal acetylenes (Sonogashira coupling) provides a novel route to (E)-nitroenynes. These Pd-catalyzed coupling methods offer a convenient and stereospecific entry into a diverse array of synthetically and biologically useful alpha,beta-disubstituted nitroethylenes. (c) 2007 Elsevier Ltd. All rights reserved.
作者:Peter J. S. S. van Eijk、Cor Overkempe、Willem P. Trompenaars、David N. Reinhoudt、Lauri M. Manninen、Gerrit J. van Hummel、Sybolt Harkema
DOI:10.1002/recl.19881070202
日期:——
yield the trans four-membered cyclic nitrones 12–13 upon reaction with 6. Nitroalkene 4i reacts with 6c to give a 1:1 mixture of the cis and trans four-membered cyclic nitrones 9g and 13i. The trans stereochemistry of trans-N,N-diethyl-2, 3-dihydro-3-(2-methoxynaphthalenyl)-2-methyl-4-phenyl-2-azetecarboxamide 1-oxide (13k) was elucidated by means of X-ray analysis. Only from the reaction of 1-nitrocyclopentene
Reichert; Wegner, Chemische Berichte, 1938, vol. 71, p. 1254,1258
作者:Reichert、Wegner
DOI:——
日期:——
Alcoholic Ammonia as a Reagent in the Nitrostilbene Series
作者:David E. Worrall
DOI:10.1021/ja01314a074
日期:1935.11
EIJK, PETER J. S. S. VAN;OVERKEMPE, COR;TROMPENAARS, WILLEM P.;REINHOUDT,+, REC. TRAV. CHIM. PAYS-BAS, 107,(1988) N 2, 27-39
作者:EIJK, PETER J. S. S. VAN、OVERKEMPE, COR、TROMPENAARS, WILLEM P.、REINHOUDT,+
DOI:——
日期:——
Stereospecific approach to α,β-disubstituted nitroalkenes via coupling of α-bromonitroalkenes with boronic acids and terminal acetylenes
作者:Madhu Ganesh、Irishi N.N. Namboothiri
DOI:10.1016/j.tet.2007.09.012
日期:2007.11
(Z)-alpha-Bromo-beta-substituted nitroethylenes undergo facile Suzuki coupling with aryl, heteroaryl, and vinylboronic acids in the presence of Pd(PPh3)(4) as catalyst to afford (E)-alpha,beta-disubstituted nitroethylenes in high yield (up to 95%) and complete specificity. Similar coupling of alpha-bromonitroethylenes with terminal acetylenes (Sonogashira coupling) provides a novel route to (E)-nitroenynes. These Pd-catalyzed coupling methods offer a convenient and stereospecific entry into a diverse array of synthetically and biologically useful alpha,beta-disubstituted nitroethylenes. (c) 2007 Elsevier Ltd. All rights reserved.