Enantioselective, chemoenzymatic synthesis, and absolute configuration of the antioxidant (−)-gloeosporiol
作者:Gabriela Mancilla、M. Femenía-Ríos、Manuel Grande、R. Hernández-Galán、A.J. Macías-Sánchez、I.G. Collado
DOI:10.1016/j.tet.2010.07.074
日期:2010.10
The natural antioxidant (−)-gloeosporiol, isolated as a peracetylated derivative from a culture of the fungus Colletotrichum gloeosporioides, has been enantioselectively prepared from 3,4-dihydroxybenzaldehyde by means of a chemoenzymatic synthesis. The key intermediate was obtained by resolution with a lipase from Pseudomonas cepacia. Its stereochemistry, initially assigned as R, according to the
从真菌Colletotrichum gloeosporioides的培养物中分离出的过乙酰化衍生物形式的天然抗氧化剂(-)-羟基孢子醇已通过化学酶促合成从3,4-二羟基苯甲醛对映选择性地制备。关键中间体是通过脂肪酶从洋葱假单胞菌(Pseudomonas cepacia)中分离得到的。根据Kazlaukas关于仲醇的经验规则,其立体化学最初指定为R,已通过NMR和色光方法独立确定。这进而允许将化合物(-)- 1分配为(-)-(2 S,3 R,4 R)-2-(3',4'二羟基苯基)四氢呋喃-3,4-二醇。