189348-96-7Relevant academic research and scientific papers
Convenient synthesis of 2-alkynyl-cyclopropanes and -oxiranes
Yoshimatsu, Mitsuhiro,Gotoh, Satoshi,Gotoh, Etsuko,Tanabe, Genzoh,Muraoka, Osamu
, p. 3035 - 3041 (2007/10/03)
Addition of nucleophiles such as dimethylsulfoxonium methylide and Bu'OOLi to the conjugate enyne sulfones 4-7, 11-14, 27-28 and 31 occurs at the β-position to the phenylsulfonyl group to give the corresponding cyclopropanes 15-17 and 19-22 and the oxiran
A convenient synthesis of alkynylpyrazoles
Yoshimatsu, Mitsuhiro,Kawahigashi, Masataka,Honda, Eiji,Kataoka, Tadashi
, p. 695 - 700 (2007/10/03)
Diazomethane add to the enyne sulfones 1,3,4,6-11 regio- and stereo-selectively to give the 4-alkynyl-5-phenylsulfonyl-4,5-dihydro-3H-pyrazoles 12-15 and 17-19, which are converted by MeLi into the 4-alkynyl-1H-pyrazoles 24, 25, 16, 26, 28, 30 in good yields. 4,5-Bis(alkynyl)-1H-pyrazoles 34, 37 are also obtained by the same procedure.
