Modification for synthetic purposes on the Diels - Alder adducts 56 and 62 has only rarely been considered.

为了达到合成的目的,对Diels-Alder加 成物(56)和(62)加以改造的问题很少有人考虑.

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Diels — Alder reaction is one of the important research content in the fields of organic chemistry.

Diels—Alder反应是目前有机化学领域重要研究内容之一.

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Activated olefinic bond Amine, thiol radical initiator, cationic initiator, dienes ( Diels - alder reactive ).

活性烯键胺, 巯基,引发剂, 阳离子引发剂, 烯烃 ( 的Diels-Alder反应 ).

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They were principally used to catalyze aldol, allylation, Diels - Alder, ene and Friedel - Crafts reactions.

它们主要被用来催化Aldol, 烯丙基化, Diels-Alder, Ene和 Friedel -Crafts等反应.

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Diels - Alder reaction of 2 - merhylene - 1 - pheny 1 - 1.3 - butanedione catalysed by zinc chloride as lewis acid with 1.3 - cylcopentadiene was reported.

以氯化锌为路易斯酸催化剂,探讨了2 ─ 亚甲基─1 ─ 苯基 ─ 1.3 ─ 丁二酮与1.3 ─ 环戊二烯的Diels─Alder反应.

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There are two forms of calcium oxalate crystals in Idesia polyc - arpa var. vestila Diels, prisms and druses.

水冬瓜(Idesiapolycarpavar. vestitaDiels)体内草酸钙结晶有晶簇和棱晶两种.

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This paper provides a basis for anatomy of culture of Angelica sinensis ( Oliv. ) Diels .

本文为 当归 的栽培管理提供了解剖学依据.

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Aim To study the anti - dysmenorrhea effect of the essential oil from Angelica sinensis Diels.

目的研究当归精油治疗痛经的药理作用.

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