process for preparation of n, o, s, - cyclic acid triesters phosphorodithioique used as curing accelerator to sulfur

摘要

1367663 Cyclic phosphorodithioic acid esters UNIROYAL Inc 25 Aug 1971 [25 Aug 1970] 32293/71 Heading C2P [Also in Division C3] Compounds of Formula I where R 1 and R 2 are C 1-5 alkyl, x is 1 or 2, O represents the optional presence of oxygen and R is a monovalent or divalent group derived from an alkane (except methane), an alkene, an alkyne, an aralkane (except toluene), an alkylsubstituted aralkane (except alkyl-substituted toluene), an arylhydroxyalkane (except hydroxytoluene), an aralkylidene-hydrazinoaralkane or a mono- or divalent alicyclic (including polycyclic) radical optionally substituted by alkyl or alkaryl, a heterocyclic radical containing 1 or more heteroatoms selected from S, O and N optionally substituted by alkyl or aralkyl, a group of Formula II in which case the optional oxygen is not present, where R 3 and R 4 are C 1-5 alkyl, or R is any of the above groups but further substituted by or interrupted by one or more groups of formula =C=C=, -CH 2 OH, -CH(OH)-, #C-OH, -CH-(O-) 2 , =C-(O-) 2 , -C-(O-) 3 , -C(O)-, -C(O)-O-, -C(S)-O-, -C- (O)-S-. -C(S)-S-, =C=N-, =C=NNH-, -C(O)-NH 2 , -C(O)-NH-, -C(O)-N=, -C(O)-NHOH, -C(O)-NHNH 2 , =N-C(O)-O-, =N-C(S)-S-, =N-C(O)-N=, -Cl, -Br, -I, -NH 2 , -NH-, -N=, -NH-NH-, -NH-NH 2 , -N=N-, -NO 2 , -O-, -S-, -S-S-, -SH, -S(O)- or -S(O) 2 -, which are used as accelerators in vulcanizable compositions containing rubbery polymers, are prepared by the addition of a compound of Formula III across an unsaturated bond, or in the case of compounds in which R is a group of Formula II, by reaction of 2 moles of a compound of Formula III with alcoholic iodine.