Flash vacuum thermolysis of β-keto-trimethylsilyl-enol-ethers
作者:J. Jullien、J.M. Pechine、F. Perez、J.J. Piade
DOI:10.1016/0040-4020(82)80222-6
日期:1982.1
Thermolysis at 800° of a series of β-keto-trimethylsilyl-enol-ethers allows the elimination of a trimethylsilanol molecule through a 1,5 rearrangement. The reaction products are furanic derivatives, which are obtained in often good yields through an allenic intermediate, which has been isolated.
Synthesis of 3-Alkyl- and 3-Chloroalkyl-2-hydroxybenzoates Based on [3+3] Cyclizations of 4-Alkyl- and 4-Chloroalkyl-1,3-bis(trimethylsilyloxy)buta-1,3-dienes
The TiCl 4 -mediated [3+3] cyclization of 4-alkyl- and 4-chloroalkyl-1,3-bis(trimethylsilyloxy)buta-1,3-dienes with 3-silyl-alk-2-en- 1-ones afforded 3-alkyl- and 3-chloroalkyl-2-hydroxybenzoates, respectively; the latter containing a remote chloride functionality. The TiCl 4 - and TiBr 4 -mediated [3+3] cyclization of 1,3-bis(trimethylsilyloxy)-4-chloroalkylbuta-1,3-dienes with 1,1-diacetylcyclopropane
The first 4-chloro-1,3-bis(trimethylsilyloxy)-1,3-diene and its application to the regioselective synthesis of chlorinated arenes
作者:Stefanie Reim、Peter Langer
DOI:10.1016/j.tetlet.2008.01.139
日期:2008.3
Chlorinated phenols, benzophenones, and butenolides are prepared by various one-potcyclization reactions of the first 4-chloro-1,3-bis(trimethylsilyloxy)-1,3-butadiene.