The total synthesis of swinholide A. Part 2: A stereocontrolled synthesis of a c1–c15 segment
作者:Ian Paterson、Julian D. Smith、Richard A. Ward
DOI:10.1016/0040-4020(95)00547-l
日期:1995.8
The C1–C15 segment 3 of swinholide A was prepared in 10 steps (14% yield) from the methyl ketone 13. Key steps include (i) the asymmetric aldol reaction. 13 → 35, followed by cyclisation to give the dihydropyrone 36, (ii) the Ferrier-type rearrangement, 38 → 39, and (iii) the vinylogous Mukaiyama aldol reaction, 39 → 40.
由甲基酮13分十步(产率14%)制备了Swinholide A的C 1 -C 15链段3。关键步骤包括(i)不对称的羟醛反应。13→35,然后环化得到二氢吡喃酮36,(ii)费勒型重排38→39,和(iii)乙烯基Mukaiyama aldol反应39→40。