Tetrahedron Letters p. 1805 - 1808 (1995)
Update date:2022-08-16
Topics:
Pereira, Schubert
Srebnik, Morris
gem-Borazirconocenes, 1, readily add across Michael acceptors in the presence of Cu(I)Br*SMe2, to afford 1,4-addition products in good to excellent yilds.In the case of cycloalkenones diastereomers are produced, with the anti product favored.The selectivity with cyclopentenone is high (9:1), while with cyclohexenone it is less (3:1).In the present context, gem-borazirconocene alkanes can be regarded as α-hydroxyl anion equivalents.
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