Synthesis of the C(1)−C(12) Segment of Peloruside A by an α-Benzyloxymethyl Ketone Aldol Strategy
作者:Darren W. Engers、Martin J. Bassindale、Brian L. Pagenkopf
DOI:10.1021/ol036393z
日期:2004.3.1
The C(1)-C(12) segment of 16-membered antitumor macrolide peloruside A has been prepared by a BF(3).OEt(2)-catalyzed Mukaiyama aldol reaction between a glucose-derived C(1)-C(7) aldehyde and a C(8)-C(12) alpha-benzyloxymethyl ketone. Exclusive 2,3-anti and moderate 3,5-anti/syn facial selectivity (3.5:1) was observed in the aldol reaction. The key C(1)-C(7) aldehyde contains the required stereochemistry
由BF(3).OEt(2)催化葡萄糖衍生的C(1)-C( 7)醛和C(8)-C(12)α-苄氧基甲基酮。在醛醇缩合反应中观察到排他性的2,3-抗和中等的3,5-抗/ syn面部选择性(3.5:1)。关键的C(1)-C(7)醛在第二,第三和第五个碳原子上包含所需的立体化学,并已从商业级三乙酰D-葡萄糖以多克级有效制备。[反应:看文字]