Organocatalytic enantioselective synthesis of phthalans via Wittig/
<scp>oxa‐Michael</scp>
cascade reaction
作者:Eun Chae Son、Jaeeun No、Sung‐Gon Kim
DOI:10.1002/bkcs.12402
日期:2021.11
An enantioselective synthetic method for 1-substituted phthalans has been developed. The organocatalytic reaction between 1,3-dihydro-2-benzofuran-1-ols and Wittig reagents using cinchona squaramide-based organocatalyst proceeded with sequential Wittig reaction followed by an enantioselective intramolecular oxa-Michael reaction, yielding enantioenriched phthalans with moderate to good enantioselectivities
已开发出一种 1-取代酞烷的对映选择性合成方法。1,3-二氢-2-苯并呋喃-1-醇和 Wittig 试剂之间的有机催化反应使用基于金鸡纳方酸酰胺的有机催化剂进行,依次进行 Wittig 反应,然后是对映选择性的分子内 oxa-Michael 反应,产生具有中等至良好对映选择性的对映体富集的酞烷。