Addition reactions of allyl stannanes to an indolo[2′,3′:3,4]pyrido[1,2-b]isoquinoline imminium salt
2000
The addition of organometallic reagents to the 13b-position of the indolo[2′,3′:3,4]pyrido[1,2-b]isoquinoline imminium salt 4 is described. Reaction of 4 with tetraallyl tin in 2-methoxyethanol gave the allyl adduct 7 in moderate yield. Further elaboration of 7 yielded the pentacyclic benzylidene alcohols 13 and 14. Structure elucidation of the compounds prepared was achieved by a combination of 1H nmr spec troscopy and X-ray crystallography.
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