Preparation of chiral cyclopropanes with a carbohydrate fragment from levoglucosenone
作者:Alexander V. Samet、Anatolly M. Shestopalov、Dmitriy N. Lutov、Lyudmila A. Rodinovskaya、Alexander A. Shestopalov、Victor V. Semenov
DOI:10.1016/j.tetasy.2007.08.013
日期:2007.8
Levoglucosenone (a chiral α,β-unsaturated ketone derivative of cellulose) underwent stereoselective cyclopropanation with sulfonium ylides to form chiral trisubstituted cyclopropanes annulated with the carbohydrate moiety in high yields.
Synthesis of (2-bromo-2-hydroxyiminoacetyl)furazans(or furoxans) and 3,4-bis[furazanoyl(or furoxanoyl)]furoxans
作者:A. S. Kulikov、N. N. Makhova、L. I. Khmel'nitskii
DOI:10.1007/bf01169724
日期:1994.3
synthesized by nitrosation of bromoacetylfurazans and -furoxans with nitrosylsulfuric acid in conc. H2SO4 An efficient method for preparing the previously unknown 3,4-bis[furazanoyl(or furoxanoyl)]furoxans has been proposed; it consists of the reaction of acetylfurazans and acetylfuroxans with a mixture of a nitrating reagent and a catalytic amount of a nitrosating reagent in conc. H2SO4.
Effective synthesis of 7H-1,2,4-triazolo[3,4-b][1,3,4]thiadiazines
作者:Alexander S. Kulikov、Margarita A. Epishina、Leonid L. Fershtat、Nina N. Makhova
DOI:10.1007/s10593-018-2325-8
日期:2018.6
A highly effective method for the preparation of 7H-1,2,4-triazolo[3,4-b][1,3,4]thiadiazines was developed on the basis of condensation reaction between aryl(hetaryl) α-bromo ketones and commercially available thiocarbohydrazide, followed by treatment of the obtained 2-hydrazinyl-6H-1,3,4-thiadiazine hydrobromides with ortho esters in the presence of trifluoroacetic acid under mild conditions.
在芳基(杂芳基)α-溴代酮缩合反应的基础上,开发了一种高效的7 H -1,2,4-三唑并[3,4- b ] [1,3,4]噻二嗪的制备方法然后,在温和条件下,在三氟乙酸存在下,用原酸酯处理所得的2-肼基-6 H -1,3,4-噻二嗪氢溴酸盐。
Reactions of bromoacetyl derivatives of furoxan and furazan with S-nucleophiles
作者:A. S. Kulikov、N. N. Makhova
DOI:10.1007/bf02495521
日期:1998.1
Hetarylthioacetyl- and (2-aminothiazol-4-yl)furoxans and the corresponding furazans unknown previously were synthesized by the reactions of substituted bromoacetylfuroxans and-furazans with hetarylthiols and thiourea, respectively.