Convenient Synthesis of 4-Methylene-2-oxazolidinones and 4-Methylenetetrahydro-1,3-oxazin-2-ones via Transition-Metal Catalyzed Intramolecular Addition of Nitrogen Atom to Acetylenic Triple Bond
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
304. Unsaturated lactones. Part II. (Researches on acetylenic compounds. Part XIX.) Reactions of the esters of αβ-acetylenic hydroxy-acids with nucleophilic reagents
作者:E. R. H. Jones、M. C. Whiting
DOI:10.1039/jr9490001423
日期:——
PIRKLE W. H.; ADAMS P. E., J. ORG. CHEM., 1980, 45, NO 21, 4117-4121