By reactions of 1-R-tricyclo[4.1.0.0(2,7)]heptanes (R = H, Br) with hydrogen sulfide initiated by UV irradiation endo-6-bicyclo[3.1.1]heptanethiols and bis(endo-6-bicyclo[3.1.1]heptyl) sulfides were synthesized. The sulfides were oxidized to the corresponding sulfoxides and sulfones. The results of HBr elimination from the bromine-substituted sulfoxides and sulfones effected by potassium tert-butylate are discussed. The latter reaction results in the recovery of the system of I-substituted tricyclo[4.1.0.0(2,7)]heptane.
1,6-Dibromotricyclo[3.1.0.02,6]hexane 2e has been prepared in 56% yield by reaction of 1,6-dilithiotricyclo[3.1.0.02,6]hexane 2d with 2.5 equiv. of tosyl bromide. 2e proved to be a new source for generating tricyclo[3.1.0.02,6]hex-1-(6)-ene 1 by reaction with magnesium, with lithium sand, or with tert-butyllithium, as shown by formation of the Diels-Alder adduct 5. Ene adducts of 1 were obtained with
Synthesis of the
1-Bromotricyclo[4.1.0.02,7]heptane Adduct with
2-Bromoethanesulfonyl Bromide and Its Transformations
作者:S. G. Kostryukov、Yu. Yu. Masterova
DOI:10.1134/s107042802003015x
日期:2020.3
AbstractThe addition of 2-bromoethanesulfonyl bromide to 1-bromotricyclo[4.1.0.02,7]heptane at the C1–C7 central bicyclobutane bond follows a radical mechanism to give 1:1 adduct with a bicyclo[3.1.1]heptane structure. Treatment of the adduct with triethylamine leads to the formation of vinyl sulfone as a result of 1,2-dehydrobromination, and its reaction with 2 equiv of sodium methoxide involves 1