| abstract |
PCT No. PCT/EP95/02660 Sec. 371 Date Jan. 21, 1997 Sec. 102(e) Date Jan. 21, 1997 PCT Filed Jul. 8, 1995 PCT Pub. No. WO96/02484 PCT Pub. Date Feb. 1, 1996A process for the preparation of acyloins of the general formula I <IMAGE> (I) in which Ra and Rb are the same or different and stand for hydrogen or an optionally substituted C1-C20alkyl, an optionally substituted C6-C10aryl, an optionally substituted C7-C12aralkyl, an optionally substituted heteroaryl, or an optionally substituted heterocycloalkyl group, except for autocondensation products of formaldehyde, wherein an aldehyde of the formula IIRaCHO,(II)is reacted, in the presence of a catalyst, with an aldehyde of the formula IIIRbCHO,(III)in which Ra and Rb have the above meanings and at least one of the radicals Ra and Rb denotes a radical other than hydrogen, which have been produced, with the assistance of an auxiliary base, from a triazolium salt of the formula IV <IMAGE> (IV) |