PUMMERER REARRANGEMENT PROMOTED BY POLYPHOSPHORIC ACID TRIMETHYLSILYL ESTER (PPSE)
作者:Masa-aki Kakimoto、Yoshio Imai
DOI:10.1246/cl.1984.1831
日期:1984.10.5
It was found that PPSE catalyzed Pummerer rearrangement of various types of sulfoxides. When α-(phenylsulfinyl)acetophenone was used as sulfoxide, unusual product, phenyl phenylthioglyoxylate was isolated. The reaction seems to proceed via phosphorylation of oxygen of sulfoxides.
The seco- and rearranged-labdanes, chapecoderins A 1, B 2, and C 3 have been synthesized for the first time starting from (S)-(+)-Wieland-Miescher ketone analogue 11. Their absolute configurations have been determined as depicted in the structures 1, 2 and 3.
A seco-labdane, chapecoderin A 1, has been synthesized starting from (S)-(+)-Wieland–Miescher ketone analogue 9. The absolute configuration has been determined to be 5S,10S.
Applications of vinylogous Mannich reactions. Total synthesis of the angiotensin converting enzyme inhibitor (−)-A58365A
作者:Andreas Reichelt、Scott K Bur、Stephen F Martin
DOI:10.1016/s0040-4020(02)00631-2
日期:2002.8
A concise enantiospecific synthesis of the angiotensin converting enzyme inhibitor (−)-A58365A (7) has been achieved following a strategy in which a vinylogous Mannich reaction and a lactone–lactam rearrangement served as the key transformations. The trimethylsilyloxyfuran derived from 25, which was prepared from the known sulfoxide 16, served as the nucleophilic partner in a vinylogous Mannich reaction