VI11 methyl bromide in 80 ml. of ether essentially as described10 afforded 7.9 g.(76%) of crude IV, mp 110-115, suitable for the next step. The analytical sample of IV, obtained with little loss by crystallization from methanol, melted at 128-129'. Similarly 11.3 g.(71y0) of crude X, mp 175-178', was obtained from 16.0 g. of 111. The analytical sample, obtained with little loss by crystallization from methanol, melted at 183-184'. Anal. Calcd. for ...