Stereochemistry of Seven-membered Heterocycles: XLIV. Spatial Structure of 4-R-3,5-Dioxabicyclo[5.1.0]octanes
作者:V. Yu. Fedorenko、R. N. Baryshnikov、B. I. Khairutdinov、R. M. Vafina、Yu. G. Shtyrlin、V. V. Klochkov、E. N. Klimovitskii
DOI:10.1007/s11178-005-0160-8
日期:2005.2
4-R-3,5-Dioxabicyclo[5.1.0]octanes were prepared in good yields by reduction of the corresponding 8,8-dichloro derivatives in a system Li-t-BuOH. According to the data of dynamic 1H and 13CNMR spectroscopy involving experiments in the NOESY mode the formal (R = H) at −93°C in (CD3)2CO exists in nearly equally occupied chair forms with endo- and exo-oriented three-membered ring. The like structure were found in the diastereomeric 4-Me(t-Bu)-analogs. The characteristic feature of 13C NMR spectra consists in considerable difference in the chemical shifts of the C8 atoms (Δδ∼16–17 ppm). The data on epimerization of diastereomers and calculations along AM1 procedure suggest for formal a three-component equilibrium including a twist-form.
SOULIER J.; FARINES M.; BONAFOS-BASTOUILL A.; LAGUERRE A., BULL. SOC. CHIM. FR. <BSCF-AS>, 1975, NO 7-8, PART. 2, 1763-1766
作者:SOULIER J.、 FARINES M.、 BONAFOS-BASTOUILL A.、 LAGUERRE A.
DOI:——
日期:——
Synthesis and Herbicidal Activity of Some Substituted 1,3-Dioxacycloalkanes and gem-Dichlorocyclopropanes
作者:Yu. G. Borisova、Sh. Sh. Dzhumaev、N. S. Khusnutdinova、L. M. Mryasova、G. Z. Raskildina、S. S. Zlotskii
DOI:10.1134/s1070363222010017
日期:2022.1
from ethylene glycol and cis-butene-1,4-diol, 1,3-dioxacycloalkanes derivatives with carbo- and heterocyclic fragments were obtained and characterized by mass spectrometry and NMR. Studying the herbicidalactivity of the obtained compounds on monocotyledonous and dicotyledonous plants confirm the feasibility and prospects of creating herbicides combining in their structure cycloacetal and gem-dichlorocyclopropane