One-Pot Synthesis of 2-Substututed 3-Thioxo-2,3-dihydro-1H-isoindol-1-ones by the Reaction of N-Substituted 2,N-Dilithiobenzamides with Isothiocyanates
摘要:
This paper describes an efficient one-pot method for the preparation of 2-substituted 3-thioxo-1H-isoindol-l-ones (3-thioxoisoindolinones) by the reaction of N-substituted 2,N-dilithiobenzamides, generated by treating N-substituted benzamides with two equivalents of butyllithium, with the respective isothiocyanates followed by ring closure of the resulting N-alkyl(or aryl)-2-(alkyl(or aryl)thiocarbamoyl)benzamide derivatives with loss of alkyl(or aryl)amines.
Odorant and/or flavoring disulphides, compositions containing same and
申请人:Givaudan Corporation
公开号:US04188488A1
公开(公告)日:1980-02-12
Novel odorant and/or flavoring substances such as 2-phenylethyl-ethyl-disulphide, process for preparing such disulphides and odorant and flavoring products containing the sulphides are disclosed.
Novel odorant and/or flavoring substances such as 2-phenylethyl-ethyl-disulphide, process for preparing such disulphides and odorant and flavoring products containing the sulphides are disclosed.