Gas-phase preparation of vinyl phosphonic acid derivatives

Details Gas-phase preparation of vinyl phosphonic acid derivatives Gas-phase preparation of vinyl phosphonic acid derivatives

1991-04-22

1992-07-21

Lee, Mary C.

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

Organic compounds

Phosphorus esters

558142, 558215, 558217, 562 8, 562 25, C07F 96574, C07F 940, C07F 938

Patent

active

051324440

ABSTRACT:
A process for the preparation of vinyl phosphonic derivatives of the general formula I ##STR1## in which R.sup.1 and R.sup.2 are the same or different and may stand for hydrogen or a C.sub.1 -C.sub.8 -alkyl, a C.sub.6 -C.sub.10 -aryl, or a C.sub.8 -C.sub.10 -aralkyl radical optionally substituted by Cl or Br, and in which R.sup.1 and R.sup.2 may alternatively be joined together to form an alicyclic ring having from 3 to 12 carbon atoms in the ring, wherein an ethane phosphonic ester of the general formula II ##STR2## in which R.sup.3 and R.sup.4 have the meanings stated above for R.sup.1 and R.sup.2 except for hydrogen and X denotes a hydroxy group, a halogen atom, or a radical of the formula

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March, J. Advanced Organic Chemistry; Third Edition; John Wiley and Sons; New York, 1985; pp. 901-905, pp. 914-916.
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