The product 10d is further confirmed by single crystal data. The -ester 2b substituent gives products with 12% yield, along with decarboxylated product 9d in 55% yield. The -, ,-and ,-substituents did not react due to steric addition of trichlorocarbene. In case of -substituents only 5% yield of product 8c where isolated. Overall, the use of trichloro acetate in combination with TBAC is limited to olefin and -ester and to some extent to -substituents only.