A new α-selective synthetic equivalent for the crotyl anion in additions to imines
Autor: | Manfred Heuschmann, Johannes Betz |
---|---|
Rok vydání: | 1995 |
Předmět: | |
Zdroj: | Tetrahedron Letters. 36:4043-4046 |
ISSN: | 0040-4039 |
DOI: | 10.1016/0040-4039(95)00670-8 |
Popis: | Two equivalents of vinylmagnesium bromide add to imines 1 in the presence of cerium trichloride to form homoallylic amines 3 as 2:1-adducts, Z-diastereomers being preferred by a margin of 88:12 to 71:29. Suitable chiral imines 1g-i are transformed to l- products l- 3g-i with high diastereoselectivity. |
Databáze: | OpenAIRE |
Externí odkaz: |