(2,6-Dimethoxyphenyl)-dimethylsilyl group constitutes a neworthogonal masked hydroxyl group. Protodesilylation of this arylsilane occurs under photochemical conditions in the presence of alcohols such as hexafluoroisopropanol (HFIP) or isopropanol. These mild and neutralconditions thus allowed the oxidation of organosilicon compounds such as β-hydroxysilanes that are known to be prone to Peterson
A concise and high yielding synthesis of (−)-tabtoxinine-β-lactam 1, the cause of tobacco wildfire disease, was achieved from l-serine using a zinc-mediated coupling reaction, Sharpless asymmetric dihydroxylation and lactamization of N-OBn amide as the key steps.
Polycyclic amines useful as cerebrovascular agents
申请人:——
公开号:US05071853A1
公开(公告)日:1991-12-10
A novel series of polycyclic amines, derivatives, methods of making the compounds, novel intermediates, compositions containing them, and methods for using them in the treatment and prevention of cerebrovascular disorders are disclosed.
申请人:INSTITUTE FOR BASIC SCIENCE 기초과학연구원(120120549213) Corp. No ▼ 160171-0006707BRN ▼314-82-15276
公开号:KR20210113052A
公开(公告)日:2021-09-15
본 발명은 신규한 아미드화 방법에 관한 것으로, 본 발명에 따르면 광 조사에 의해 활성화된 N-중심 라디칼을 활용한 온화하고 선택적인 아미드화 방법을 제공할 수 있다. 또한, 본 발명은 무촉매 시스템에서 수행되는 이미드화 방법으로, 상업적으로도 매우 유리할 뿐 아니라 간편하고 효율적이며, 다양한 양태의 관능기를 갖는 알데하이드로부터 유도된 아미드 화합물을 제공할 수 있어, 다양한 기술분야에서의 변형과 적용이 가능할 것으로 기대된다.
A new route to 6,6-disubstituted penams and 7,7-disubstituted cephems
作者:Malcolm M. Campbell、Graham Johnson
DOI:10.1039/c39750000479
日期:——
The reaction of penicillanate esters with N-chloro-N-sodiourethane gave 6,6-diacylaminopenicillanates from which the corresponding 7,7-diacylaminodeacetoxycephalosporanates were prepared via the sulphoxides.