Visible light-promoted dihydroxylation of styrenes with water and dioxygen
作者:Bo Yang、Zhan Lu
DOI:10.1039/c7cc06745c
日期:——
The first efficient visible light promoted metal-free dihydroxylation of styrenes with water and dioxygen has been developed for the construction of vicinal alcohols. The protocol was operationally simple with broad substrate scope. The mechanistic studies demonstrated that one of the hydroxyl group came from water and the other one came from molecular oxygen. Additionally, the ß-alkyoxy alcohols could
Herein reported is a photo‐induced production of vicinal diols from alkenes under mild reaction conditions. The present dihydroxylation method using diacetyl (= butane‐2,3‐dione), oxygen, and water dispenses with toxic reagents and intractable waste generation.
Resolution of Diols via Catalytic Asymmetric Acetalization
作者:Ji Hye Kim、Ilija Čorić、Chiara Palumbo、Benjamin List
DOI:10.1021/ja512481d
日期:2015.2.11
A highly enantioselective kinetic resolution of diols via asymmetricacetalization has been achieved using a chiral confined imidodiphosphoric acid catalyst. The reaction is highly efficient for the resolution of tertiary alcohols, giving selectivity factors of up to >300. Remarkably, even in cases where the selectivity factors are only moderate, highly enantioenriched diols are obtained via a stereodivergent
4-oxo-4,7-dihydrothieno[2,3-b]pyridine-5-carboxamides as antiviral agents
申请人:Schnute Edward Mark
公开号:US20050004161A1
公开(公告)日:2005-01-06
The invention provides a compound of formula I:
wherein A, B, R
1
, R
2
, R
3
, and R
4
are as defined in the specification. The compounds of the present invention are useful for treating viral infections, in particular a herpesviral infection.
Optically active or racemic aminal derivatives, process for preparing same and for converting same to alpha-hydroxyaldehydes
申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:EP0011417A1
公开(公告)日:1980-05-28
An optically active or racemic a-hydroxyaldehyde of formula
wherein R, represents a C6-C14 aryl group, C1-C10 alkyl group, C1-C10 alkenyl group, C2-C10 alkynyl group, C2-C14 aralkyl group, or a group containing a functional group in the organic portion of said groups and R: represents a C1-C10 alkyl group, C1-C10 alkenyl group, C1-C10 alkynyl group, C7-C14 aralkyl group, C6-C14 aryl group or a group containing a functional group in the organic portion of these groups, which is an important intermediate for preparation of pharmaceuticals and agricultural chemicals and can be prepared by reacting an optically active or racemic compound of formula
wherein A represents a C6-C14 aryl group or a C1-C4 alkyl or alkoxy group- or halogen-substituted C6-C14 aryl group and R is as defined above, with a Grignard reagent, and thereafter hydrolyzing the reaction product.
The compound of formula (1) above can for example be prepared by reaction of an arylglyoxal with an optically active or racemic 2-iN-substituted aminomethyl)pyrroiidine or by reacting a Grignard reagent with an optically active or racemic. diazabicyclooctane derivative which itself can be prepared from a glyoxylate ester or glyoxylate ester hemiacetal and a 2(-N-substituted aminomethyl)pyrrolidine.