Divergent synthesis is a powerful strategy for the fast assembly of different molecular scaffoldsfrom identical starting materials. We describe here a solvent-controlled photocatalytic divergent cyclization of alkynyl aldehydes with sulfonyl chlorides for the direct construction of highly functionalized cyclopentenones and dihydropyranols that widely exist in bioactive molecules and natural products
Synthesis of 6-(arylmethylidene)octahydropyrrolo[1,2-a]pyrimidines and 5-(arylmethylidene)hexahydropyrrolo[1,2-a]imidazoles by the interaction of alk-4-ynals with a,?-diaminoalkanes in DMSO in the presence of KOH
作者:Konstantin N. Shavrin、Valentin D. Gvozdev、Oleg M. Nefedov
DOI:10.1016/j.mencom.2013.05.006
日期:2013.5
Cyclization of alk-4-ynals with alpha,omega-diaminoalkanes in DMSO under the action of KOH affords bicyclic N,N-enaminals - 6-(arylmethylidene)octahydro[1,2-a]pyrimidines and 5-(arylmethylidene)hexahydro[1,2-a]imidazoles.