An Efficient Synthesis of Carlosic Acid and Other 5-Carboxymethyltetronates from Malates
作者:Rainer Schobert、Carsten Jagusch
DOI:10.1055/s-2005-870018
日期:——
S-Carlosic acid was prepared in six steps and 32% yield from malic acid. Ring closure was effected by a domino addition-Wittig alkenation reaction with Ph3PCCO. A variant employing resin-bound malates furnished immobilized 5-carboxymethyltetronates. It should be amenable to parallelization and automation.