Synthesis and evaluation of antileukemic activity of 5-thienyl- or 5-(2-furyl)-2,3-dihydro-6,7-bis(hydroxymethyl)-1H-pyrrolizine bis(alkylcarbamates) and derivatives
作者:Daniel Laduree、Jean Charles Lancelot、Max Robba、E. Chenu、G. Mathe
DOI:10.1021/jm00122a028
日期:1989.2
arboxylic acid with acetic anhydride and dimethyl acetylenedicarboxylate gave 5-substituted derivatives of dimethyl 2,3-dihydro-1H-pyrrolizine-6,7-dicarboxylate and derivatives of dimethyl 5-(2-thienyl)pyrrolo[1,2-c]thiazole. Reduction of 2 with lithiumaluminumhydride gave the diols 3a, 3b, 3c and 3d. These diols yielded the corresponding diacetates 4 by treatment with acetic anhydride. The bis(methylcarbamates)
Rapid Photoassisted Access to N,O,S-Polyheterocycles with Benzoazocine and Hydroquinoline Cores: Intramolecular Cycloadditions of Photogenerated Azaxylylenes
作者:Olga A. Mukhina、N. N. Bhuvan Kumar、Teresa M. Arisco、Roman A. Valiulin、Greg A. Metzel、Andrei G. Kutateladze
DOI:10.1002/anie.201103597
日期:2011.9.26
Ring the changes: A new photoassisted approach to give conformationally constrained N,O,S‐polyheterocyclic scaffolds of unprecedented topologies was achieved by intramolecular [4+4] and [4+2] cycloadditions of photogenerated o‐azaxylylenes (23 examples; see scheme). The precursors can be readily assembled by simple and high‐yielding reactions, thus making this a powerful synthetic method amenable to