Stereoselective synthesis of the bicyclo[5.3.0]decane portion of the diterpene antibiotic guanacastepene using a pyrylium-ylide [5+2] cycloaddition reaction
摘要:
Treatment of 14 with Ac2O/Et3N resulted in [5+2] cyclization to give 2, which was further elaborated into 20, thus establishing the required stereochemistry in the top-half of guanacastepene 1. (C) 2001 Elsevier Science Ltd. All rights reserved.
Stereoselective synthesis of the bicyclo[5.3.0]decane portion of the diterpene antibiotic guanacastepene using a pyrylium-ylide [5+2] cycloaddition reaction
摘要:
Treatment of 14 with Ac2O/Et3N resulted in [5+2] cyclization to give 2, which was further elaborated into 20, thus establishing the required stereochemistry in the top-half of guanacastepene 1. (C) 2001 Elsevier Science Ltd. All rights reserved.
PYRROLOPYRIDAZINE JAK3 INHIBITORS AND THEIR USE FOR THE TREATMENT OF INFLAMMATORY AND AUTOIMMUNE DISEASES
申请人:Wrobleski Stephen T.
公开号:US20140011795A1
公开(公告)日:2014-01-09
Disclosed are compounds of Formula (I), and pharmaceutically acceptable salts thereof. The compounds of formula (I) inhibit tyrosine kinase activity of JAK3, thereby making them useful for the treatment of inflammatory and autoimmune diseases.
Stereoselective synthesis of the bicyclo[5.3.0]decane portion of the diterpene antibiotic guanacastepene using a pyrylium-ylide [5+2] cycloaddition reaction
Treatment of 14 with Ac2O/Et3N resulted in [5+2] cyclization to give 2, which was further elaborated into 20, thus establishing the required stereochemistry in the top-half of guanacastepene 1. (C) 2001 Elsevier Science Ltd. All rights reserved.