Rearrangement of oxiranes, on contact with active Al2O3, earlier studied with methyldialkyl-substituted 1,2-epoxides, has now been extended to 1,2-dialkyl epoxides (cyclohexene oxide, cycloheptene oxide) and β-himachalene monoepoxide (tetrasubstituted). Isomerisation of citronellol epoxide has been investigated to detect any participation of the OH function in oxirane opening. To gauge the importance
先前与甲基二烷基取代的1,2-环氧化物研究过的环氧乙烷与活性Al 2 O 3接触后的重排现已扩展至1,2-二烷基环氧化物(环己烯氧化物,环庚烯氧化物)和β-him麻单环氧化物(四取代) )。已经对香茅醇环氧化物的异构化进行了研究,以检测OH官能团在环氧乙烷开口中的任何参与。为了衡量3β,4β-环氧丙烷重排底物拓扑结构的重要性,已将结果与较早使用3α,4α-环氧丙烷进行重排的结果进行了比较。
Synthesis of Optically Active Macrolides From L-Menthone Derivatives and Hydrazides of Adipic and 2,6-Pyridinedicarboxylic Acids
作者:M. P. Yakovleva、K. S. Denisova、G. R. Mingaleeva、R. R. Gazetdinov、G. Yu. Ishmuratov
DOI:10.1007/s10600-018-2387-y
日期:2018.5
Efficient syntheses of two potentially useful opticallyactive macroheterocycles with esters and dihydrazides of 2,6-pyridinedicarboxylic and adipic acids starting from available natural L-menthol and passing through intermediate 8-hydroxy-2,6R-dimethyloctan-3-one were developed. The key steps were [2 + 1]-reaction of the last with 2,6-pyridinedicarboxylic acid chloride and [1 + 1]-condensation of the resulting
Synthesis from l-menthol of optically active macroheterocycles containing ester, azine, or hydrazide groups
作者:G. Yu. Ishmuratov、G. R. Mingaleeva、O. O. Shakhanova、R. R. Muslukhov、E. M. Vyrypaev、A. G. Tolstikov
DOI:10.1007/s10600-011-9883-7
日期:2011.5
A synthesis of optically pure methyl- and isopropyl-branched 21-, 22-, 28-, and 29-membered azinodiesters and diesterdihydrazides from l-menthol using [2 + 1]-condensation of (6R)-8-hydroxy-2,6-dimethyloctan3-one and glutaric and adipic acid chlorides and [1 + 1]-reaction of the intermediate diketodiesters with hydrazine hydrate and glutaric acid dihydrazide was developed.
Synthesis of macrocyclic azino and dihydrazido diesters by consecutive [2 + 1]- and [1 + 1]-condensations
作者:G. Yu. Ishmuratov、G. R. Mingaleeva、M. P. Yakovleva、O. O. Shakhanova、R. R. Muslukhov、A. G. Tolstikov
DOI:10.1134/s1070428011090260
日期:2011.9
Efficient procedures for the synthesis of 21-24- and 28-31-membered macrocyclic azino diesters and dihydrazido diesters were developed starting from L-menthol, Delta(3)-carene, (+)-alpha-pinene, tetrahydropyran, and 4-methyltetrahydropyran. The key steps in these syntheses were consecutive [2 + 1]- and [1 + 1]-condensations. The 31-membered dihydrazido diester exhibited strong antibacterial activity.