A Stereoselective Aldol Approach for the Total Syntheses of Two 6-Alkylated 2<i>H</i>-Pyran-2-ones
作者:Singanaboina Rajaram、Dasari Ramesh、Udugu Ramulu、Peddikotla Prabhakar、Yenamandra Venkateswarlu
DOI:10.1002/hlca.201300139
日期:2014.1
A simple and highly efficient stereoselective total synthesis of the 6‐alkylated pyranones (6R)‐6‐[(1E,4R,6R)‐4,6‐dihydroxy‐10‐phenyldec‐1‐en‐1‐yl]‐5,6‐dihydro‐2H‐pyran‐2‐one (1) and (6S)‐5,6‐dihydro‐6‐[(2R)‐2‐hydroxy‐6‐phenylhexyl]‐2H‐pyran‐2‐one (2) was developed using Crimmins' aldol reaction, SmI2 reduction, Grubbs‐II‐catalyzed olefin cross‐metathesis, and Still's modified HornerWadsworthEmmons
6烷基化吡喃酮(6 R)-6 [[(1 E,4 R,6 R)-4,6-二羟基-10-苯基癸-1-烯-1-基]的简单高效立体选择性全合成] ‐5,6‐dihydro‐2 H ‐pyran‐2‐one(1)和(6 S)‐5,6‐dihydro‐6 ‐ [[(2 R)‐2‐hydroxy‐6‐phenylhexyl] ‐2 H吡喃-2-酮(2)使用开发克里敏斯'醛醇缩合反应,SMI 2还原,格鲁布斯- II催化的烯烃交叉复分解,和静止的改性霍纳沃兹沃思埃蒙斯反应。