Novel, racemic and optically active phosphorus compounds of the formula ##STR1## wherein R signifies lower alkyl, lower alkoxy or protected hydroxy, R.sup.1 signifies lower alkoxy, phenoxy, benzyloxy, chlorine or bromine, R.sup.2 stands for lower alkyl or lower alkoxy and n represents the number 0, 1 or 2, are described. These compounds are valuable intermediates in the manufacture of not only known, but also novel diphosphine ligands.
本文介绍了式子##STR1##中R代表低级烷基、低级烷氧基或保护羟基,R.sup.1代表低级烷氧基、苯氧基、苄氧基、
氯或
溴,R.sup.2代表低级烷基或低级烷氧基,n代表数字0、1或2的手性
磷化合物的新颖混合物和光学活性混合物。这些化合物是制备已知和新颖二
膦配体的有价值的中间体。