N-benzyl-2,2-dimethoxy-acetamides

Details N-benzyl-2,2-dimethoxy-acetamides N-benzyl-2,2-dimethoxy-acetamides

C - Chemistry, Metallurgy

07

D

260/556.1

C07D 217/24 (2006.01)

Patent

CA 1060045

ABSTRACT OF THE DISCLOSURE N-benzyl-2,2-dimethoxy-acetamides having the formula Image wherein R1 represents hydrogen, halogen, alkyl having 1 to 4 carbon atoms or alkoxy having 1 to 4 carbon atoms, R2 represents hydrogen or alkoxy having 1 to 4 carbon atoms, R3 represents hydrogen, alkyl having 1 to 4 carbon atoms, phenyl or benzyl, and R4 represents hydrogen, alkyl having 1 to 4 carbon atoms, phenyl, benzyl or phenethyl which may be ring- substituted by at least one alkoxy having 1 to 4 carbon atoms, and processes for preparing the same. These acetamides are useful for the production of 2H-3-isoquinolones by acid cyclization and said 2H-3-isoquinolones are in turn useful as starting materials inter alia in the synthesis of 1,4-dihydro-1,4-etheno-isoquinolin-3(2H)ones, which are valuable chemotherapeutic agents as disclosed in Canadian Patent Specification No. 960,143 issued on December 31, 1974.

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