Reactivity of the nitrogen-silicon bond. Pyridines and furo[2,3-b][1,4]diazepines from 4-amino-1-azabutadienes via 1,2-dihydro-1,3,2-diazasilines

Article abstract of DOI:10.1055/s-1992-34176

1,2-Dihydro-1,3,2-diazasilines 2 are prepared from 4-amino-1-azadienes 1 and react with dialkyl acetylenedicarboxylates to produce six- and seven-membered heterocycles depending on the substitution pattern of 1. Highly functionalized pyridine-2-carboxylat