Process for the preparation of chiral intermediates useful for t

Details Process for the preparation of chiral intermediates useful for t Process for the preparation of chiral intermediates useful for t

1994-07-08

1996-01-23

Tsang, Cecilia

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549296, 5482688, 5483154, C07D31700, C07D24908, C07D23304

Patent

active

054866251

ABSTRACT:
Described is a process for preparing chiral compounds of the formula ##STR1## wherein X.sup.1 and X.sup.2 are independently F or Cl, and Y is Cl, Br or I, comprising reacting a triol of the formula ##STR2## wherein X.sup.1 and X.sup.2 are as defined above, with acetone in the presence of a catalyst, then with a halogen selected from Cl.sub.2, Br.sub.2 or I.sub.2, or N-bromosuccinimide or N-iodosuccinimide.

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