Tricyclic dihydropyrazolone and tricyclic dihydroisoxazolone potassium channel openers
申请人:——
公开号:US20020007059A1
公开(公告)日:2002-01-17
Compounds of formula I
1
are useful in treating diseases prevented by or ameliorated with potassium channel openers. Also disclosed are potassium channel opening compositions and a method of opening potassium channels in a mammal.
The Development of a Sulfamate-Tethered Aza-Michael Cyclization Allows for the Preparation of (−)-Negamycin tert-Butyl Ester
作者:Harshit Joshi、Appasaheb K. Nirpal、Debobrata Paul、Steven P. Kelley、Joel T. Mague、Shyam Sathyamoorthi
DOI:10.1021/acs.joc.4c00604
日期:2024.4.19
We present the first examples of intramolecular aza-Michael cyclizations of sulfamates and sulfamides onto pendant α,β-unsaturated esters, thioesters, amides, and nitriles. Stirring the substrate with catalytic quantities of the appropriate base delivers the product in good yield and excellent diastereoselectivity. The reactions are operationally simple, can be performed open to air, and are tolerant