Synthesis of functionalized tetrahydro-1,3-diazepin-2-ones and 1-carbamoyl-1H-pyrroles viaring expansion and ring expansion/ring contraction of tetrahydropyrimidines
作者:Anastasia A. Fesenko、Ludmila A. Trafimova、Anatoly D. Shutalev
DOI:10.1039/c1ob06284k
日期:——
based on the ring expansion reaction of 1,2,3,4-tetrahydropyrimidin-2-ones under the action of nucleophiles has been developed. The first step of the synthesis was preparation of N-[(2-benzoyloxy-1-tosyl)ethyl]urea by three-component condensation of 2-benzoyloxyethanal, urea and p-toluenesulfinic acid. Nucleophilicsubstitution of the tosyl group in the obtained sulfone with sodium enolates of α-phenylthioketones
基于1,2,3,4-四氢嘧啶-2-的扩环反应制备6-苯硫基取代的2,3,4,5-四氢-1 H -1,3-二氮杂-2-酮的一般方法已经开发了在亲核试剂作用下的药物。合成的第一步是通过三组分缩合制备N -[(2-苯甲酰氧基-1-甲苯磺酰基)乙基]脲。2-苯甲酰氧基乙缩醛, 尿素 和 对甲苯磺酸。用α-苯基硫酮的烯醇钠对所得砜中的甲苯磺酰基进行亲核取代,然后环化-脱水,再进行苯甲酰化,得到4-羟基甲基-5-苯基硫代1,2,3,4-四氢嘧啶-2-酮合成4-甲磺酰氧基甲基衍生物。用亲核试剂(例如NaCN)处理后者丙二酸二乙酯钠,PhSNa,MeONa,NaBH 4,琥珀酰亚胺钠或邻苯二甲酰亚胺钾,提供了目标多功能的二氮杂pin酮。由于环收缩,在酸性条件下,将获得的6-苯硫基-二氮杂庚酮及其6-甲苯磺酰基取代的类似物转化为3-取代的1-氨基甲酰基-1 H-吡咯。使用环扩展/环收缩序列实现了从4-甲甲氧基甲基-嘧啶有效地一锅合成。
Process for producing 2-benzoyloxyacetaldehyde derivative
申请人:Nishikawa Kazuyoshi
公开号:US20050234246A1
公开(公告)日:2005-10-20
A process produces a 2-benzoyloxyacetaldehyde derivative represented by following Formula (3):
wherein R
1
and R
2
may be the same as or different from each other and are each a hydrocarbon group, wherein R
1
and R
2
may be combined to form a ring with the adjacent oxygen-carbon-oxygen bond, and wherein the benzene ring in the formula may be substituted, by allowing a halogenated acetaldehyde acetal derivative represented by following Formula (1):
wherein R
1
and R
2
are as defined above; and X represents a halogen atom, to react with a benzoate represented by following Formula (2):
wherein M represents an alkali metal atom and wherein the benzene ring in the formula may be substituted, in the presence of an alkali-metal halide.
General approach to 6-tosyl-2,3,4,5-tetrahydro-1H-1,3-diazepin-2-ones via nucleophile-mediated ring expansion of tetrahydropyrimidines
作者:Anastasia A. Fesenko、Marcus L. Tullberg、Anatoly D. Shutalev
DOI:10.1016/j.tet.2009.01.015
日期:2009.3
A general six-step approach to 6-tosyl-2,3,4,5-tetrahydro-1H-1,3-diazepin-2-ones has been developed. The key step involves a ringexpansion reaction of 4-mesyloxymethyl- or 4-tosyloxymethyl-5-tosyl-1,2,3,4-tetrahydropyrimidin-2-one mediated by nucleophilic reagents.
已经开发了一种通常的六步法制备6-甲苯磺酰基-2,3,4,5-四氢-1 H -1,3-二氮杂-2--2-酮。关键步骤涉及由亲核试剂介导的4-甲磺酰氧基甲基-或4-甲磺酰氧基甲基-5-甲磺酰基-1,2,3,4-四氢嘧啶-2-酮的扩环反应。
Preparation of intermediates useful in the synthesis of antiviral nucleosides
申请人:——
公开号:US20030162992A1
公开(公告)日:2003-08-28
The present invention is an efficient process for the manufacture of &agr;-acyloxyacetaldehyde, a key intermediate in the synthesis of 1,3-oxathiolane and 1,3-dioxolane nucleosides.
Asymmetric synthesis of (2′R,4′R) and (2′S,4′S)-1,3-dioxolanyl triazole C-nucleosides
作者:Fucheng Qu、Joon H. Hong、Jinfa Du、M.Gary Newton、Chung K. Chu
DOI:10.1016/s0040-4020(99)00499-8
日期:1999.7
In view of biological activities of both 1,3-dioxolanyl nucleosides and C-nucleosides, d- and l-1,3-dioxolanyl C-nucleosides have been synthesized as potential antiviral and/or anticancer agents. Asymmetric synthesis of four new optically pure d- and l-1,3-dioxolanyl triazole C-nucleosides has been accomplished via key intermediate 5a and 5b starting from d- and l-2,3-O-isopropylidene glyceraldehyde