A flexible, highly efficient method for the preparation of homochiral oxazaphospholidine-boranes
摘要:
An efficient and operationally simple procedure for the synthesis of 2-substituted 3,4-dimethyl-5-phenyloxazaphospholidine derivatives has been developed. This new method permits the large scale preparation of a range of electronically and sterically differentiated homochiral monophosphine precursors.
The synthesis and applications to allylic substitutions of a range of
novel ligands based on diazaphospholidines is described; enantiomeric
excesses of up to 89% were achieved in an allylic substitution
reaction.
BONNINGUE C.; BRAZIER J. F.; HOUALLA D.; OSMAN F. H., PHOSPH. AND SULFUR, 1979, 5, NO 3, 291-298
作者:BONNINGUE C.、 BRAZIER J. F.、 HOUALLA D.、 OSMAN F. H.
DOI:——
日期:——
Sheehan Susan Kult, Jiang Meiqun, McKinstry Lydia, Livinghouse Tom, Garto+, Tetrahedron, 50 (1994) N 21, S 6155-6162
作者:Sheehan Susan Kult, Jiang Meiqun, McKinstry Lydia, Livinghouse Tom, Garto+
DOI:——
日期:——
Synthesis and applications to asymmetric catalysis of a series of mono- and bis(diazaphospholidine) ligands
作者:Donald Smyth、Heather Tye、Colin Eldred、Nathaniel W. Alcock、Martin Wills
DOI:10.1039/b106399p
日期:2001.11.1
The synthesis of a series of closely related mono- and bis(diazaphospholidine) ligands has been achieved using the condensation of a diamine with a bis(dimethylamino)arylphosphine. The resulting ligands have given excellent results in palladium-catalysed allylic substitution reactions to form C–C bonds (up to 89% ee) and C–N bonds (up to 78% ee).
An efficient and operationally simple procedure for the synthesis of 2-substituted 3,4-dimethyl-5-phenyloxazaphospholidine derivatives has been developed. This new method permits the large scale preparation of a range of electronically and sterically differentiated homochiral monophosphine precursors.