Initial attempts in our laboratory to directly generate 1a from 1b by reductive debromination have not met with success. Most surprising was the failure of tri-n-butyltin hydride to produce any volatile products on reaction with 1b in mineral oil. (4) (a) D. C. Law and S. W. Tobey, J. Am. Chem. Soc., 90, 2376(1968; (b) related work described in ref 1.(5) (a) R.
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