BICYCLIC HETEROCYCLE DERIVATIVES FOR THE TREATMENT OF PULMONARY ARTERIAL HYPERTENSION
申请人:Bruce Ian
公开号:US20150025059A1
公开(公告)日:2015-01-22
Bicyclic heterocyclic derivatives of formula I useful in inhibiting PDGF receptor mediated biological activity.
wherein A is
and R
1
, R
1a
, R
2
, R
3
, R
4
, R
5
, R
6
and X are as defined herein.
more efficient than the bimolecular reaction of the dissociated reagents above room temperature. This finding provides a method for improving the reactions of CSI with unreactive alkenes. Chlorosulfonylisocyanate (CSI) is a sluggish electrophile in reactions with electron-deficient alkenes or with many monofluoroalkenes. The efficiency of these reactions is improved at temperatures between –15 and