申请人:Industry Academic Cooperation Foundation, Hallym University 한림대학교 산학협력단(220070195175) BRN ▼221-82-10284
公开号:KR101702870B1
公开(公告)日:2017-02-06
본 발명은 자연적으로 발생하는 2,6 위치의 작용기가 치환된 피페리딘 알칼로이드인 (-)-피니디논의 신속한 입체선택적 합성방법에 관한 것이다. 이 방법은 에틸 아세토아세테이트를 출발물질로 하며 알데하이드와 ( S )- tert -부탄설핀아마이드, 알릴 브로마이드, 인듐의 입체선택적 α-아미노알릴화 및 그럽스 올레핀 교차치환반응을 주요 단계로 한다.
An efficient method has been found for the preparation of cyclic monodithioacetats of 1,3-dicarbonyl compounds usingborontrifluorideetherate as the acid catalyst. Asymmetric 1,3-diketones react regioselectively in most of the cases tried. A study of the 13C and 1H nmr characteristics of these compounds has been carried out.
已经发现使用三氟化硼醚化物作为酸催化剂来制备1,3-二羰基化合物的环状单二硫代乙酸酯的有效方法。在大多数尝试过的情况下,不对称的1,3-二酮会发生区域选择性反应。已经对这些化合物的13 C和1 H nmr特性进行了研究。
Photosensitized cleavage of the dithio protecting group by visible light
作者:Gary A. Epling、Qingxi Wang
DOI:10.1016/s0040-4039(00)61086-9
日期:1992.9
Dithio derivatives of aldehydes and ketones have been deprotected under neutral conditions using visible light provided by a 120 Watt spotlight and methylene green as a sensitizer. The key step in the deprotection is apparently an electron transfer from the dithio derivative to the electronically excited visible dye. The resulting dithio radical cation undergoes fragmentation, and the corresponding
Promotion of 1,3-dithiolanes using a bentonitic clay as catalyst
作者:J. M. Aceves、G. A. Arroyo、Y. M. Vargas、R. Miranda、A. Cabrera、F. Delgado
DOI:10.1002/hc.10215
日期:——
The reactions between 1,2-ethandithiol with several carbonylic compounds to form the corresponding 1,3-dithiolanes were performed using a natural clay as promotor. The target molecules are used as reagents to obtain fine chemicals, herbicides, fungicides, and pharmaceutical compounds among others applications. A kinetic study of camphorquinone and 1,2-ethandithiol showed a first-order dependence with
In the reaction of 2-ethoxy-1,3-oxathiolane with carbonylcompounds in the presence of ZnCl2 or HgCl2, it has been found that only the breaking of the endocyclic bond (C–O or C–S bond) occurs, while the breaking of the exocyclic C–O bond to give the 1,3-oxathiolan-2-ium ion is unfavorable. This behavior is different from that of 2-ethoxy-1,3-dithiolane, in which the breaking of the endocyclic C–S bond