[EN] PROCESS FOR MAKING 1,2-DIOXOLANES<br/>[FR] PROCEDE DE PRODUCTION DE 1,2-DIOXOLANES
申请人:ZENECA LIMITED
公开号:WO1997021699A1
公开(公告)日:1997-06-19
(EN) A process for making a 1,2-dioxolane of formula (1), which comprises reacting a dienoic acid or derivative of formula (2), with a peroxy compound in the presence of a mercury salt followed by demercuration wherein R is aryl, aralkyl, C1-30-alkyl or alkenyl which may be substituted; R1 and R2 are each, independently, hydrogen, C1-6-alkyl, aralkyl or R1 and R together with the carbon atom to which they are attached form a ring; R3 is -OR4 or -NR5R6; R4 is hydrogen, C1-6-alkyl, aryl or aralkyl; and R5 and R6 are each, independently, hydrogen, C1-6-alkyl, aralkyl or R5 and R6 together with the nitrogen atom to which they are attached form a ring.(FR) Procédé de production d'un 1,2-dioxolane de formule (1) qui consiste à faire réagir un acide diénoïque ou un dérivé de formule (2) avec un composé peroxy en présence d'un sel de mercure puis à procéder à une démercuration. Dans les formules (1) et (2), R représente alkyle, aralkyle, alkyle C1-30 ou alkyle pouvant être substitué; R1 et R2 représentent chacun indépendamment, alkyle C1-6, alkyxle ou bien R1 et R forment ensemble un anneau, avec l'atome de carbone auquel ils sont attachés; R3 représente -OR4 ou -NR5R6; R4 représente hydrogène, alkyle C1-6, aryle ou aralkyle; et R5 et R6 représentent chacun indépendamment hydrogène, alkyle C1-6, aralkyle ou bien R5 et R6 forment ensemble un anneau, avec l'atome d'azote auquel ils sont attachés.
A short synthesis of naturally occurring and other analogues of plakinic acids that contain the 1,2-dioxolane group
作者:A.J. Bloodworth、Brian D Bothwell、Andrew N Collins、Nicola L Maidwell
DOI:10.1016/0040-4039(96)00143-8
日期:1996.3
Natural and unnatural analogues 4 of plakinicacids A, C and D have been prepared in three steps from alkan-2-ones by (i) LDA-induced condensation with ethyl 3-methylbut-2-enoate to give (2Z)-3,5-dimethylalka-2,4-dienoic acids 10, then (ii) isomerisation to the 2E-isomers 5 and finally (iii) peroxymercuriation with 30% hydrogen peroxide and reduction in situ with sodium borohydride.
Allylation of Ketones with Methyl 3-(Bromomethyl)but-3-enoate. Synthesis of Bioactive Unsaturated Lactones Based on Benzo[f]coumarin and Its Derivatives
作者:Yu. P. Lamekina、T. A. Kulahava、V. A. Shumski、I. V. Mineyeva
DOI:10.1134/s1070428022060021
日期:2022.6
developed for the allylation of structurally diverse ketones with methyl 3-(bromomethyl)but-3-enoates, and the possibility of using the allylation products in the target-oriented synthesis of new heterocyclic compounds has been demonstrated. Modification of benzo[f]coumarinderivatives at the keto group via Barbier allylation with methyl 3-(bromomethyl)but-3-enoate has been performed for the first time with
摘要 已经开发出有效的方法来用 3-(溴甲基)丁-3-烯酸甲酯对结构多样的酮进行烯丙基化,并且已经证明了在新杂环化合物的靶向合成中使用烯丙基化产物的可能性。首次使用 3-(溴甲基)丁-3-烯酸甲酯通过 Barbier 烯丙基化对酮基上的苯并[ f ]香豆素衍生物进行修饰,目标是随后形成内酯片段。合成的苯并[ f ]香豆素衍生物已通过光谱方法表征,并估计了它们穿透磷脂双层的能力。已发现这些化合物既不影响 C6 大鼠神经胶质瘤细胞的活力也不影响增殖。得到的苯并[ f]香豆素衍生物在基于过氧化氢和次氯酸钠的模型系统中表现出抗氧化特性。