Acid catalyzed intramolecular Diels-Alder reactions in lithium perchlorate-diethyl ether: Acid promoted migration of terminal dienes prior to [4+2] cycloaddition in conformationally restricted substrates
作者:Paul A. Grieco、James P. Beck、Scott T. Handy、Naoki Saito、John F. Daeuble、Ernest E. Campaigne、Marvin Carmack
DOI:10.1016/0040-4039(94)85004-6
日期:1994.9
Use of 10 mol% camphorsulfonic acid in 5.0 M lithium perchlorate-diethyl ether to promote intramolecularDiels-Alderreactions of conformationally restricted substrates, wherein the substrates possess a terminal diene unit, gives rise to tandem diene migration - [4+2] cycloaddition.
Stereoselectivities of thermal and Lewis acid catalyzed intramolecular Diels-Alder reactions of internally activated dienophiles to form 5–11 membered rings
作者:Douglas A. Smith、Kunio Sakan、K.H. Houk
DOI:10.1016/s0040-4039(00)85086-8
日期:1986.1
The thermal and Lewisacidcatalyzed intramolecular Diels-Alderreactions of 1 (n = 5–11) have been studied. The catalyzedreactions efficiently form 7–11 membered rings and produce mainly cis adducts. Lewisacids prevent the five-membered ring forming reaction.