Patent ID: 6235944
Filing Date: 2001-05-22
Classification: C07C

Abstract:
A method for the production of secondaryalkoxy-1-alkenes having the structure (A): ##STR3##where R.sub.1 and R.sub.2 each independently are a hydrogen atom or a monovalent hydrocarbon radical having from 1 to 10 carbon atoms; R, R.sub.3 and R.sub.4 each independently are a substituted or unsubstituted monovalent hydrocarbon group having from 1 to 10 carbon atoms; or secondaryalkoxy-1-alkenes having the structure (A'): ##STR4##where R and R' are joined to form a ring R', which ring contains 5 to 8 carbon atoms, where the method comprises the steps of:(a) forming a reaction mixture of a cyclic or an acyclic ketone of the formula: ##STR5##a secondaryalkyl orthoformate ester of the formula: ##STR6##where R, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are as defined above for acyclic ketones and R.sub.2 is hydrogen for cyclic ketones, andan alkanol of the formula:R.sub.3 R.sub.4 CH--OH,where R.sub.3 and R.sub.4 are as defined above;(b) adding to the reaction mixture of step (a) an effective amount of an acid catalyst;(c) agitating the reaction mixture while monitoring the progress of the reaction; and(d) recovering the secondaryalkoxy-1-alkene from the reaction mixture as a liquid.