名称:
Further developments in the synthesis of lamellarin alkaloids via direct metal–halogen exchange
摘要:
Direct metal-halogen exchange of 2-bromopyrrole carbonate derivatives with tert-butyllithium followed by the intramolecular lactonization of the resulting 2-pyrrole anion onto the carbonate provided the corresponding lamellarins in moderate to good yield. The lamellarin framework could be obtained from the direct metal-halogen exchange strategy in a 26-33% overall yield over 5-6 steps. (C) 2003 Elsevier Science Ltd. All rights reserved.
DOI:
10.1016/s0040-4039(02)02887-3