Synthesis, deprotonation, and alkylation of S-allyl sulfoximines
摘要:
N-Phenyl-S-(4-methylphenyl)-sulfoximidoyl chloride 1 reacts with allyltrimethylsilane in the presence of aluminum chloride to give benzothiazine 4 in fair yield along with a small amount of S-allyl sulfoximine 3a. On the other hand, 1 reacts with allyltributyltin to give the S-allyl sulfoximine 3a almost exclusively. This latter reaction appears to be general. The sulfoximine 3a is thermally stable and can be deprotonated smoothly with n-BuLi. The anion reacts regioselectively but not stereoselectively with simple alkylating agents. Reactions of the anion with selected aldehydes and enones proceeds with some regiocontrol and, with some exceptions, little stereocontrol.
Synthesis, deprotonation, and alkylation of S-allyl sulfoximines
摘要:
N-Phenyl-S-(4-methylphenyl)-sulfoximidoyl chloride 1 reacts with allyltrimethylsilane in the presence of aluminum chloride to give benzothiazine 4 in fair yield along with a small amount of S-allyl sulfoximine 3a. On the other hand, 1 reacts with allyltributyltin to give the S-allyl sulfoximine 3a almost exclusively. This latter reaction appears to be general. The sulfoximine 3a is thermally stable and can be deprotonated smoothly with n-BuLi. The anion reacts regioselectively but not stereoselectively with simple alkylating agents. Reactions of the anion with selected aldehydes and enones proceeds with some regiocontrol and, with some exceptions, little stereocontrol.
Synthesis, deprotonation, and alkylation of S-allyl sulfoximines
作者:Michael Harmata、R.J. Claassen
DOI:10.1016/0040-4039(91)80202-h
日期:1991.11
N-Phenyl-S-(4-methylphenyl)-sulfoximidoyl chloride 1 reacts with allyltrimethylsilane in the presence of aluminum chloride to give benzothiazine 4 in fair yield along with a small amount of S-allyl sulfoximine 3a. On the other hand, 1 reacts with allyltributyltin to give the S-allyl sulfoximine 3a almost exclusively. This latter reaction appears to be general. The sulfoximine 3a is thermally stable and can be deprotonated smoothly with n-BuLi. The anion reacts regioselectively but not stereoselectively with simple alkylating agents. Reactions of the anion with selected aldehydes and enones proceeds with some regiocontrol and, with some exceptions, little stereocontrol.