Palladium catalyzed coupling of organostannanes with vinyl epoxides
作者:David R. Tueting、Antonio M. Echavarren、J.K. Stille
DOI:10.1016/0040-4020(89)80010-9
日期:1989.1
The coupling reaction of organotin reagents with vinyl epoxides, catalyzed by palladium, takes place at ambient temperatures, regioselectively, giving predominately the 1,4-addition product. Both aryl- and vinylstannanes undergo coupling in high yields, while acetylenic, allylic and benzylic tin reagents either give low yields or fail to couple. Although the double bond geometry in the vinylstannane
Synthesis of the Macrolactone Cores of Maltepolides via a Diene–Ene Ring-Closing Metathesis Strategy
作者:Man Ki Sit、Hui Hui Cao、Yan-Dong Wu、Tsz Chun Yip、Lars Eric Bendel、Wen Zhang、Wei-Min Dai
DOI:10.1021/acs.orglett.3c00106
日期:2023.3.17
Synthesis of the C19-truncated maltepolide E has been accomplished via a diene–ene ring-closingmetathesis (RCM) strategy without damage to the C11–C14 alkenyl epoxy unit. Upon release of the C17-OH group, it attacked at the C14 position with double bond migration and epoxide ring opening to furnish the C19-truncated maltepolides A and B as proposed for the biosynthesis of maltepolides.
C19 截短的马替泊内酯 E 的合成是通过二烯-烯闭环复分解 (RCM) 策略完成的,而不会损坏 C11-C14 烯基环氧单元。释放 C17-OH 基团后,它攻击 C14 位置,双键迁移和环氧化物开环,以提供 C19 截短的麦芽内酯 A 和 B,如提议用于麦芽内酯的生物合成。