Stereoselective synthesis of pyrrolidines: catalytic oxidative cyclizations mediated by osmium.
(Chemical Equation Presented) A new pathway for oxidative cyclization : N-protected α-amino alcohols with distal alkene units cyclize with complete stereoselectivity and stereospecificity to cispyrrolidines, dependent on the substitution pattern of the starting material. In addition to providing nit...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2006
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| Summary: | (Chemical Equation Presented) A new pathway for oxidative cyclization : N-protected α-amino alcohols with distal alkene units cyclize with complete stereoselectivity and stereospecificity to cispyrrolidines, dependent on the substitution pattern of the starting material. In addition to providing nitrogen- and oxygen-containing heterocycles in good to excellent yields, the catalyst loadings can be reduced to just 0.2 mol% osmium. TMO = Me 3NO, TFA = trifluoroacetic acid, Ts = toluene-4-sulfonyl. © 2006 Wiley-VCH Verlag GmbH and Co. KGaA. |
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