TBDPS and Br-TBDPS Protecting Groups as Efficient Aryl Group Donors in Pd-Catalyzed Arylation of Phenols and Anilines
作者:Chunhui Huang、Vladimir Gevorgyan
DOI:10.1021/ja904791y
日期:2009.8.12
as an efficient phenyl group donor for o-bromophenols via Pd-catalyzed C-Harylation followed by a routine TBAF deprotection of the resulting silacycles. Employment of the newly designed Br-TBDPS protecting group in the same sequence allows for a facile introduction of a phenyl group at the ortho position of phenols and anilines. Alternatively, switching desilylation to oxidation in the last step allows
The invention is concerned with novel mandelic acid derivatives of formula (I)
1
wherein R
1
to R
10
, X and Y are as defined in the description and in the claims, as well as pharmaceutically acceptable salts thereof.
These compounds inhibit the formation of coagulation factors Xa, IXa and thrombin induced by factor VIIa and tissue factor.
The invention is concerned with novel mandelic acid derivatives of formula (I)
wherein R1 to R10, X and Y are as defined in the description and in the claims, as well as pharmaceutically acceptable salts thereof.
These compounds inhibit the formation of coagulation factors Xa, IXa and thrombin induced by factor VIIa and tissue factor.