Tetrahedron p. 2217 - 2228 (1996)
Update date:2022-08-17
Topics:
Murugesh
Subburaj
Trivedi
A synthesis of novel pterocarpans (8a-3, 10a-c and 11a-e) and pterocarpenes (7a-d and 9a-c) has been carried out. This method involves the Lewis acid Ti(IV) promoted formal (3 + 2) cycloaddition reaction of 2-alkoxy-1,4-benzoquinones (6a-c) with appropriately substituted 2H-chromenes (1a-b, 2a-b and 5) at -78°C.
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Doi:10.1016/S0960-894X(01)00353-5
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