A Modular Reaction Pairing Approach to the Diversity-Oriented Synthesis of Fused- and Bridged-Polycyclic Sultams
摘要:
A reaction pairing strategy centered on utilization of a reaction triad (sulfonylation, SNAr addition and Mitsunobu alkylation) generating skeletally diverse, tricyclic and bicyclic benzofused sultams is reported. Pairing sulfonylation and SNAr reactions yields bridged, tricyclic and bicyclic benzofused sultams. Application of the Mitsunobu reaction in a sulfonylation-Mitsunobu-SNAr pairing allows access to benzthiazocine-1,1-dioxides, while a simple change in the order of pairing to sulfonylation-SNAr-Mitsunobu affords structurally different, bridged tricyclic benzofused sultams.
A Modular Reaction Pairing Approach to the Diversity-Oriented Synthesis of Fused- and Bridged-Polycyclic Sultams
摘要:
A reaction pairing strategy centered on utilization of a reaction triad (sulfonylation, SNAr addition and Mitsunobu alkylation) generating skeletally diverse, tricyclic and bicyclic benzofused sultams is reported. Pairing sulfonylation and SNAr reactions yields bridged, tricyclic and bicyclic benzofused sultams. Application of the Mitsunobu reaction in a sulfonylation-Mitsunobu-SNAr pairing allows access to benzthiazocine-1,1-dioxides, while a simple change in the order of pairing to sulfonylation-SNAr-Mitsunobu affords structurally different, bridged tricyclic benzofused sultams.
A Formal [4 + 4] Complementary Ambiphile Pairing Reaction: A New Cyclization Pathway for <i>ortho</i>-Quinone Methides
作者:Thiwanka B. Samarakoon、Moon Y. Hur、Ryan D. Kurtz、Paul R. Hanson
DOI:10.1021/ol100495w
日期:2010.5.21
A formal, one-pot [4 + 4] cyclization pathway for the generation of eight-membered sultams via in situ generation of an ortho-quinone methide (o-QM) is reported. The pairing of ambiphilic synthons in a complementary fashion is examined whereby o-fluorobenzenesulfonamides are merged with in situ generated o-QM in a formal [4 + 4] cyclization pathway to afford 5,2,1-dibenzooxathiazocine-2,2-dioxide scaffolds under microwave (mW) conditions. The method reported represents the first use of an o-QM in a formal hetero [4 + 4] cyclization.
A Modular Reaction Pairing Approach to the Diversity-Oriented Synthesis of Fused- and Bridged-Polycyclic Sultams
作者:Thiwanka B. Samarakoon、Joanna K. Loh、Alan Rolfe、Lisa S. Le、Sun Young Yoon、Gerald H. Lushington、Paul. R. Hanson
DOI:10.1021/ol201962n
日期:2011.10.7
A reaction pairing strategy centered on utilization of a reaction triad (sulfonylation, SNAr addition and Mitsunobu alkylation) generating skeletally diverse, tricyclic and bicyclic benzofused sultams is reported. Pairing sulfonylation and SNAr reactions yields bridged, tricyclic and bicyclic benzofused sultams. Application of the Mitsunobu reaction in a sulfonylation-Mitsunobu-SNAr pairing allows access to benzthiazocine-1,1-dioxides, while a simple change in the order of pairing to sulfonylation-SNAr-Mitsunobu affords structurally different, bridged tricyclic benzofused sultams.