Stereoselective synthesis of octahydro-3bH-[1,3]dioxolo[4″,5″:4′,5′]furo[2′,3′:5,6]pyrano[4,3-b]quinolines via intramolecular hetero-Diels–Alder reactions catalyzed by bismuth(III) chloride
作者:Gowravaram Sabitha、E Venkata Reddy、J.S Yadav、K.V.S Rama Krishna、A Ravi Sankar
DOI:10.1016/s0040-4039(02)00704-9
日期:2002.5
A new, efficient and stereoselective synthesis of furo[2′,3′:5,6]pyrano[4,3-b]quinoline derivatives 3 and 3′ has been achieved by intramolecular hetero–Diels–Alder reactions of aldimines generated in situ from aromatic amines and the O-allyl derivative of the chiral sugar derived aldehyde 2 in acetonitrile in the presence of a catalytic amount of BiCl3. The products are formed with extremely high trans
通过原位产生的醛亚胺的分子内异狄尔斯-阿尔德反应,实现了呋喃[2',3':5,6]吡喃并[4,3- b ]喹啉衍生物3和3'的新的高效立体选择性合成在催化量的BiCl 3存在下,由乙胺中的芳族胺和手性糖衍生的醛2的O-烯丙基衍生物制成。形成的产物具有极高的反式选择性,且产率高至优异。