Aminopyridine-Borane Complexes as Hydrogen Atom Donor Reagents: Reaction Mechanism and Substrate Selectivity
作者:Florian Barth、Florian Achrainer、Alexander M. Pütz、Hendrik Zipse
DOI:10.1002/chem.201702469
日期:2017.9.27
Alternative for tinhydrides: The crucial choice of initiators and reaction conditions for Lewis base borane mediated radical chain reduction reactions has been investigated in detail. An inverted selectivity was found for the reduction of iodides versus xanthates as compared to tinhydride reagents.
An Efficient, One-Pot, Triton-B Catalyzed Synthesis of O-Alkyl-S-methyl Dithiocarbonates
作者:Devdutt Chaturvedi、Suprabhat Ray
DOI:10.1007/s00706-006-0514-0
日期:2006.9
A novel process for the one-stepconversion of a variety of primary and secondary alcohols into their O -alkyl- S -methyl dithiocarbonates using methyl iodide catalyzed by the Triton-B/CS2 system was developed. Thus, O -alkyl- S -methyl dithiocarbonates were obtained in very good to excellent yields. This protocol is mild and efficient compared to other methods.
Superoxide Ion–Promoted Facile One-Pot Synthesis of <i>O</i>-Alkyl-<i>S</i>-methyl Dithiocarbonates from Alcohol Under Mild Reaction Conditions
作者:Satish Kumar Singh、Krishna Nand Singh
DOI:10.1080/10426507.2010.482545
日期:2010.12.30
Abstract A new, mild, and efficient protocol for the one-pot synthesis of O-alkyl-S-methyl dithiocarbonates (xanthates) has been described in reasonably good yields from a variety of alcohols employing carbon disulfide and methyl iodide using superoxide ion at room temperature. GRAPHICAL ABSTRACT
Structure and reactivity of 2-alkyl- and 2-alkoxy-thiazolin-5-ones
作者:J. H. Davies、R. H. Davis、R. A. G. Carrington
DOI:10.1039/p19720001983
日期:——
2-Alkylthiazolin-5-ones resemble the 2-aryl compounds in that they are readily enolisable and can easily be acylated on oxygen. In contrast 2-alkoxythiazolin-5-ones do not enolise in polar solvents and can only be acylated with the aid of a strong base such as sodium hydride.
2-Aminopyridine compounds and use thereof as drugs
申请人:——
公开号:US20040006082A1
公开(公告)日:2004-01-08
The present invention provides 2-aminopyridine compound having an excellent adenosine receptor (A
1
, A
2a
, A
2b
receptors) antagonism, which is represented by the following formula:
1
(wherein, R
1
represents cyano group, carboxyl group or an optionally substituted carbamoyl group; R
2
represents hydrogen atom, hydroxyl group, an optionally substituted C
1-6
alkoxy group, an optionally substituted C
6-14
aromatic hydrocarbon cyclic group or an optionally substituted 5- to 14-membered aromatic heterocyclic group; and R
3
and R
4
are the same as or different from each other and each represents a C
6-14
aromatic hydrocarbon cyclic group, a 5- to 14-membered non-aromatic heterocyclic group or a 5- to 14-membered aromatic heterocyclic group which may be substituted, respectively) or a salt thereof.