Connective Synthesis of Polysubstituted Tetrahydropyrans by a Novel and Stereocontrolled Metallo-ene/Intramolecular Sakurai Cyclization Sequence
摘要:
A novel methodology based upon the allylmetalation step followed by an Intramolecular Sakurai Cyclization (IMSC) provides an efficient access to a variety of tetrahydropyran derivatives. This new strategy nicely complements our initial protocol that embodied a tandem ene reaction/IMSC sequence. Both mono- and dihydroxy-tetrahydropyrans could be easily assembled with complete stereocontrol at the various chiral centers.
Connective Synthesis of Polysubstituted Tetrahydropyrans by a Novel and Stereocontrolled Metallo-ene/Intramolecular Sakurai Cyclization Sequence
摘要:
A novel methodology based upon the allylmetalation step followed by an Intramolecular Sakurai Cyclization (IMSC) provides an efficient access to a variety of tetrahydropyran derivatives. This new strategy nicely complements our initial protocol that embodied a tandem ene reaction/IMSC sequence. Both mono- and dihydroxy-tetrahydropyrans could be easily assembled with complete stereocontrol at the various chiral centers.
Connective Synthesis of Polysubstituted Tetrahydropyrans by a Novel and Stereocontrolled Metallo-ene/Intramolecular Sakurai Cyclization Sequence
作者:Bernard Leroy、István E. Markó
DOI:10.1021/jo025899c
日期:2002.12.1
A novel methodology based upon the allylmetalation step followed by an Intramolecular Sakurai Cyclization (IMSC) provides an efficient access to a variety of tetrahydropyran derivatives. This new strategy nicely complements our initial protocol that embodied a tandem ene reaction/IMSC sequence. Both mono- and dihydroxy-tetrahydropyrans could be easily assembled with complete stereocontrol at the various chiral centers.