Synthesis and Reactivity of a Novel Class of Long-Lived Ammonium Ylides: Derivatives of Benzo[<i>b</i>]pyrrolo[2,1-<i>f</i>][1.6]naphthyridine
作者:Leonid G. Voskressensky、Ilya V. Vorobiev、Tatyana N. Borisova、Alexey V. Varlamov
DOI:10.1021/jo8003698
日期:2008.6.1
Reaction of 10-cyanotetrahydrobenzo[b][1,6]naphthyridines (1−6) with activated alkynes affords stable benzo[b]pyrrolo[2,1-f][1,6]naphthyridine-4-ium ylides (7−14) in moderate yields. A proposed mechanism for their formation consists of a new tandem multistage process.
10-氰基四氢苯并[ b ] [1,6]萘啶(1-6)与活化炔烃的反应可得到稳定的苯并[ b ]吡咯并[2,1- f ] [1,6]萘吡啶-4-鎓叶立德(7- 14)中度产量。提出的形成它们的机制包括一个新的串联多级过程。
Tandem transformations of 10-substituted tetrahydrobenzo[b][1,6]naphthyridines resulted from the Michael addition of the nitrogen atom of the tetrahydropyridine fragment to the triple bond of activated alkynes
作者:L. G. Voskressensky、T. N. Borisova、I. V. Vorob’ev、N. M. Postika、E. A. Sorokina、A. V. Varlamov
DOI:10.1007/s11172-008-0200-y
日期:2008.7
A reaction of 10-R-substituted tetrahydrobenzo[b][1,6]naphthyridines (R = CN, CONH2, Me) with dimethylacetylenedicarboxylate, methyl and ethyl propiolates, and acetylacetylene has been studied. It was found that 1-acryloyl-10-cyanotetrahydrobenzo[b][1,6]naphthyridines are the major products of the reaction of alkyl propiolates with 10-cyano-substituted naphthyridines, whereas the reaction with 10