Prepd from cyclohexylmagnesium bromide and formaldehyde in ether: Gilman, Catlin, Org. Synth. coll. vol. I (2nd ed., 1941) p 188; Hiers, Adams, J. Am. Chem. Soc. 48, 2385 (1926); Marvel et al., ibid. 50, 2810 (1928). For prepn of cyclohexylmagnesium bromide see Org. Syn., loc. cit.; Gilman, Zoellner, J. Am. Chem. Soc. 53, 1945 (1931).