Patent ID: 6852866

Claim:
A process for the preparation of a compound having the structure I, wherein each R, independently, is selected from the group consisting of hydrogen, hydroxy, alkoxy having up to 8 carbon atoms, acyloxy having up to 8 carbon atoms, acylamino having up to 8 carbon atoms, C 1 to C 20 hydrocarbyl and substituted hydrocarbyl and amino; R 3 is selected from the group consisting of H, C 1 to C 20 hydrocarbyl and substituted hydrocarbyl; m is 0 or 1, and n and n′ are, independently, 4 or 5, comprising: contacting azides of the structure IA: wherein R is selected from the group consisting of hydrogen, hydroxy, alkoxy having up to 8 carbon atoms, acyloxy having up to 8 carbon atoms, acylamino having up to 8 carbon atoms, C 1 to C 20 hydrocarbyl or substituted hydrocarbyl and amino; n is 4 or 5, and m is 0 or 1, with compounds of the structure IB wherein R is as described above and R 3 is selected from the group consisting of H, C 1 to C 20 hydrocarbyl and substituted hydrocarbyl; and n′ is 4 or 5.