Ce travail décrit une approche permettant de parvenir à des hétérocycles indoliques tri et tétracycliques.
骑行自行车技术和骑行技术的发展历程。
Thermal 1,6-Electrocyclization Reactions of Acceptor-Substituted 2,3-Divinyl-1H-indoles Yielding Functionalized Carbazoles
作者:Ulf Pindur、Reinhard Adam
DOI:10.1002/hlca.19900730408
日期:1990.6.20
Three new synthetic procedures for and thermal 1,6-electrocyclizations of acceptor-substituted2,3-divinyl-1H-indoles leading to functionalizingcarbazoles are described. The scope and limitations as well as some mechanistic aspects of the methodologies are discussed. The key strategies employed include Pd(II)-catalyzed coupling and Wittig procedures.
Selective lithiation of 2,3-dibromo-1-methylindole. A synthesis of 2,3-disubstituted indoles
作者:Yanbing Liu、Gordon W Gribble
DOI:10.1016/s0040-4039(02)01710-0
日期:2002.9
Indole (1) can be converted to 2,3-dibromo-1-methylindole (3) in two operations (92% yield). Treatment of 3 with tert-butyllithium effects clean monolithiation to 3-bromo-2-lithio-1-methylindole (4), which can be trapped with various electrophiles to afford the 3-bromo-2-substituted indoles (5-8) in 85-99% yield. A second bromine-lithium exchange reaction and quenching with electrophiles yields the 2,3-disubstituted indoles (9-10) in 88-95% yield. (C) 2002 Published by Elsevier Science Ltd.
DUPAS G.; DUFLOS J.; QUEGUINER G., J. HETEROCYCL. CHEM., 1980, 17, NO 1, 93-96
作者:DUPAS G.、 DUFLOS J.、 QUEGUINER G.
DOI:——
日期:——
DUPAS, G.;DUFLOS, J.;QUEGUINER, G., J. HETEROCYCL. CHEM., 1983, 20, N 4, 967-970