... Previously (3) we have described thesc reactions as pro- Page 2. 252$ l". ll. Pinkerton and SF Tliames Vol. ... (2) F. 11. Pinkerton and SF Thames, J. Heterocyclic Chem., 6, 4-33 (1909). (3) F. 11. ... (9) AF Wchb, D. Sethi and 11. Gilman, J. Organometal. Cheni., 21, p. 61 (1970). ...