Preparation of novel 1-hydroxycyclopropanecarboxylic acid intermediates

Abstract

A bissilylated 1-hydroxycyclopropanecarboxylic acid of the formula ##STR1## in which R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each independently is a hydrogen atom or an alkyl radical, and additionally R.sup.2 and R.sup.3 can together form a 3- to 5-membered carbon bridge, and R.sup.5, R.sup.6 and R.sup.7 each independently is an alkyl radical, is produced by oxidizing with oxygen a cyclobutene-1,2-diol-bis-trialkyl-silyl ether of the formula ##STR2## The products, without isolation, may directly be hydrolyzed to remove the silyl radicals and form known intermediates for further reaction.

Dependencies are inferred from the claim text.