Efficient and Convenient Deprotection of Thiocarbonyl to Carbonyl Compounds Using 3-Carboxypyridinium and 2,2'-Bipyridinium Chlorochromates in Solution, Dry Media, and under Microwave Irradiation
deprotection reactions is reported. Different types of thioamides, thioureas, thiono esters, and thioketones are deprotected to their corresponding carbonyl compounds with these reagents in good to excellent yields. The reactions were carried out in solution, under solvent-free conditions, and under microwave irradiation. The results show that with both reagents the rates of the reactions and the yields
Novel five-membered heterocyclic amidines, their preparation and use as competitive inhibitors of trypsin-like serine proteases, especially thrombin and kininogenases such as kallikrein. Pharmaceutical compositions which contain the compounds as active ingredients, and use of the compounds as thrombin inhibitors, anticoagulants and antiinflammatory agents.
The reaction of nitroacetamides with thionation reagents synthesis of mono- and dithio- oxalic acid diamides
作者:Philip A. Harris、Arthur Jackson、John A. Joule
DOI:10.1016/s0040-4039(00)99198-6
日期:——
Nitroacetamides, R1(R2)N.CO.CH2NO2, react with phosphorus sulphide (P4S10) or 2,4-bis(4-methoxyphenyl)-1,2-dithiadiphosphetane-2,4-disulphide, Lawesson's reagent, to give amidethioamides, R1(R2)N.CO.CS.NH2.
硝基乙酰胺R 1(R 2)N.CO.CH 2 NO 2与硫化磷(P 4 S 10)或2,4-双(4-甲氧基苯基)-1,2-二硫代二磷杂环戊烷-2,4-二硫化物反应,Lawesson试剂,得到酰胺硫代酰胺,R 1(R 2)N.CO.CS.NH2。