SPIRO[2.5]OCT-5-EN-6-YL BORONIC ACID PINACOL ESTER

4,4,5,5-Tetramethyl-2-(spiro[2.5]oct-5-en-6-yl)-1,3,2-dioxaborolane is used in the synthetic preparation of substituted thienylacetic acid as inhibitors of viral retroviral replication of HIV infection.