Synthetic applications of bis(iminophosphoranes). One-pot preparation of rigid bicyclic guanidines
摘要:
A one-pot synthesis of [6 + 6], [6 + 7], and [6 + 8] bicyclic guanidines based on a new method of dihydropyrimido annelation, which involves reaction of bis(iminophosphoranes) with aryl isocyanates or isothiocyanates is described. The method is also applicable for the preparation of chiral bicyclic guanidines.
Synthetic applications of bis(iminophosphoranes). One-pot preparation of rigid bicyclic guanidines
摘要:
A one-pot synthesis of [6 + 6], [6 + 7], and [6 + 8] bicyclic guanidines based on a new method of dihydropyrimido annelation, which involves reaction of bis(iminophosphoranes) with aryl isocyanates or isothiocyanates is described. The method is also applicable for the preparation of chiral bicyclic guanidines.
Intramolecular addition of benzylic radicals onto ketenimines. Synthesis of 2-alkylindoles
作者:Mateo Alajarín、Angel Vidal、María-Mar Ortín
DOI:10.1039/b310593h
日期:——
The inter- and intramolecularaddition of free radicals onto ketenimines is studied. All the attempts to add intermolecularly several silicon, oxygen or carbon centered radicals to N-(4-methylphenyl)-C,C-diphenyl ketenimine were unsuccessful. In contrast, the intramolecularaddition of benzylic radicals, generated from xanthates, onto the central carbon of a ketenimine function with its N atom linked