demonstrate a general and broadly applicable catalytic cross coupling of methylene ketones and secondary alcohols with a series of primaryalcohols to disubstituted branched ketones. A simple and nonprecious Fe2(CO)9 catalyst enables one-pot oxidations of both primary and secondary alcohols to a range of branched gem-bis(alkyl) ketones. A number of bond activations and formations selectively occurred in
A stimulation sensitive composition comprising:
(A) a compound represented by the specific formula which is capable of generating an acid or a radical by stimulation from the external.
13C chemical shift non-equivalence in methylene carbons of monosubstituted cyclohexanes
作者:Hiroshi Ito、Alfred F. Renaldo、Robert D. Johnson、Mitsuru Ueda
DOI:10.1002/mrc.1260270315
日期:1989.3
Monosubstitutedcyclohexanes were synthesized by addition of a cyclohexyl radical to olefins bearing different substituents at the α‐position. Six distinct methylene 13C resonances were observed, indicating that the methylene carbons located at the 2 and 6 positions and at the 3 and 5 positions are not magnetically equivalent. This magnetic non‐equivalence (anisochronism) observed in the monosubstituted