The stereochemistry of the cyclic β-halogeno-ether synthesis of olefinic alcohols
作者:Leslie Crombie、Robert D. Wyvill
DOI:10.1039/c39840001056
日期:——
The (Z)/(E) composition of olefinicalcohols produced by sodium ring-scission of cyclic β-halogeno-ethers can be accounted for by a mechanism involving fast electron transfer and carbanion inversion, with ring-cleavage speedier than conformational inversion.
Novel sulphur containing food flavor substances are provided containing an oxygen or sulphur atom in a five or six membered ring structure, one alkyl or hydroxy alkyl substituent at at least either of the carbon atoms adjacent to the hetero atom and having at least one sulphur or oxygen atom attached to another carbon atom of the ring structure.
Reaction of 2-methyl-4,5-dihydrofuran with hydrogen chloride
作者:Yu. N. Polivin、R. A. Karakhanov、T. S. Sheveleva、B. I. Ugrak、V. I. Kelarev
DOI:10.1007/bf00863601
日期:1992.9
Reaction of 2-methyl-4,5-dihydrofuran with HCl at 0-degrees-C yields 5'-chloro-2'-pentanone (13%) and 1'-(2-methyltetrahydrofuryl-2)-5'-chloro-2'-pentanone (27%) and at 2000 5-chloro-2-pentanone exclusively.
Synthesis of 1,3,4-trihaloalkanes
作者:N. I. Shuikin、I. F. Bel'skii、I. E. Grushko、R. A. Karakhanov