The present invention encompasses novel triterpene compounds of general formula I, wherein R
3a
, R
3b
, R
11a
, R
11b
, R
31
and R
32
are defined as in claim
1
, which are suitable for the prevention and/or treatment of diseases mediated by 11 β-HSD and the use thereof for preparing a medicament having the above-mentioned properties.
US5156973A
申请人:——
公开号:US5156973A
公开(公告)日:1992-10-20
US8476315B2
申请人:——
公开号:US8476315B2
公开(公告)日:2013-07-02
Efficient synthesis of piperazinyl amides of 18β-glycyrrhetinic acid
study, a practical method to prepare piperazinyl amides of 18β-glycyrrhetinic acid was developed. Two main procedures for the construction of important intermediate 8 are discussed. One procedure involves the amidation of 1-Boc-piperazine with 3-acetyl-18β-glycyrrhetinic acid, prepared by the reaction of 18β-glycyrrhetinic acid with acetic anhydride without any solvent at 130 °C. The other procedure to