Increasing size of the group R leads to the formation of a higher proportion of ketone in the methylation of amines of the type, Ph·CH(NH2)·R, and of a higher proportion of secondary amine in the aluminohydride reduction of oximes of the type, Ph·C(:NOH)·R.
Process for the preparation of 4-tert-butylbenzaldehyde
申请人:IMI (TAMI) INSTITUTE FOR RESEARCH & DEVELOPMENT LTD.
公开号:EP0580231A1
公开(公告)日:1994-01-26
In a process for the preparation of 4-tert-butylbenzaldehyde in high yield and purity a) 4-tert-butyltoluene is brominated using bromine and without a solvent, to obtain a mixture consisting essentially of 4-tert-butylbenzalbromide and 4-tert-butylbenzylbromide; and b) the mixture obtained in step (a) is reacted with water and a Sommelet reagent, optionally in the presence of a co-solvent, to obtain the desired product.
The present disclosure is generally directed to antiviral compounds, and more specifically directed to compounds which can inhibit the function of the NS5A protein encoded by Hepatitis C virus (HCV), compositions comprising such compounds, and methods for inhibiting the function of the NS5A protein.
The present invention discloses compounds of Formula (I), or pharmaceutically acceptable salts, esters, or prodrugs thereof:
which inhibit RNA-containing virus, particularly the hepatitis C virus (HCV). Consequently, the compounds of the present invention interfere with the life cycle of the hepatitis C virus and are also useful as antiviral agents. The present invention further relates to pharmaceutical compositions comprising the aforementioned compounds for administration to a subject suffering from HCV infection. The invention also relates to methods of treating an HCV infection in a subject by administering a pharmaceutical composition comprising the compounds of the present invention.