Facile and efficient total synthesis of (±)-cryptotanshinone and tanshinone IIA
摘要:
A concise synthesis of (+/-)-cryptotanshinone and tanshinone IIA from readily available 1,5-naphthalenediol is described in which the key step is the radical cyclization process promoted by SmI2 to make a furan ring. (C) 2003 Elsevier Science Ltd. All rights reserved.