Cyclopropanation Reactions of Pyroglutamic Acid-Derived Synthons with Akylidene Transfer Reagents
摘要:
The cyclopropanation of unsaturated lactams 1 and 3 derived from pyroglutamic acid with nucleophilic alkylidene transfer reagents is investigated. Good-to-modest yields of cyclopropanes were obtained with most sulfur ylides explored. Syn/anti selectivity was found to be dependent on the synthon as well as the sulfur ylide. This cyclopropanation methodology is used in the synthesis of arginine and glutamic acid analogues.
Cyclopropanation Reactions of Pyroglutamic Acid-Derived Synthons with Akylidene Transfer Reagents
摘要:
The cyclopropanation of unsaturated lactams 1 and 3 derived from pyroglutamic acid with nucleophilic alkylidene transfer reagents is investigated. Good-to-modest yields of cyclopropanes were obtained with most sulfur ylides explored. Syn/anti selectivity was found to be dependent on the synthon as well as the sulfur ylide. This cyclopropanation methodology is used in the synthesis of arginine and glutamic acid analogues.
Cyclopropanation Reactions of Pyroglutamic Acid-Derived Synthons with Akylidene Transfer Reagents
作者:Rui Zhang、Ahmed Mamai、Jose S. Madalengoitia
DOI:10.1021/jo9816109
日期:1999.1.1
The cyclopropanation of unsaturated lactams 1 and 3 derived from pyroglutamic acid with nucleophilic alkylidene transfer reagents is investigated. Good-to-modest yields of cyclopropanes were obtained with most sulfur ylides explored. Syn/anti selectivity was found to be dependent on the synthon as well as the sulfur ylide. This cyclopropanation methodology is used in the synthesis of arginine and glutamic acid analogues.