Patent ID: 6974884

Claim:
A phosphine-borane complex of formula: where: PR is a protecting group, R and R′, independently of one another, are optionally substituted alkyl, aryl or alkoxy groups where R and R′ may be the same or different groups and R and R′ may be covalently linked to each other; R″, independently of other R″ in the compound, can be H, an optionally substituted alkyl or aryl group where all three of R″ may be the same or each may be different, and any two or three of R″ may be covalently linked to each other; and R 2 and R 3 , independently of one another, can be selected from H, or optionally substituted alkyl or aryl groups, where R 2 and R 3 may be covalently linked to each other.