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|Title:||Regioselective synthesis of substituted pterocarpans and pterocarpenes. Lewis acid Ti(IV) promoted formal (3+2) cycloaddition reactions|
|Publisher:||PERGAMON-ELSEVIER SCIENCE LTD|
|Citation:||TETRAHEDRON, 52(6), 2217-2228|
|Abstract:||A synthesis of novel pterocarpans (8a-e, 10a-e and 11a-e) and pterocarpenes (7a-d and 9a-c) has been carried out. This method involves the Lewis acid Ti (TV) 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 degrees C.|
|Appears in Collections:||Article|
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