WebJan 1, 1970 · A stereospecific synthesis of dl -cyclopenin ( 1) is described corroborating previous structural and stereochemical assignments. The hippuric acid 10 was converted to cis ester 11 which was reduced and cyclized separately to cis and trans 3-benzylidene-4-methyl-1- H -1,4-benzodiazepin-2,5-diones 12 and 14. WebNature

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Web摘要： Over-expression of the tumor necrosis factor alpha(TNF-α) is responsible for a number of pathological conditions,and TNF-α plays a pivotal role in the origin and progression of rheumatoid arthritis(RA) and other immune mediated disorders,so the development of small-molecule TNF-α inhibitors is significant.In the course of screening … WebMass spectra of cyclopenin (I), viridicatin (III), 3-benzylidene-3,4-dihydro-4-methyl-1H-1,4-benzodiazepin-2,5-dione (VI) and derivatives of these systems were measured. Fragmentation schemes are proposed based on high resolution data, metastable peaks and, where appropriate, on deuterium labeling. george patton 3rd army units

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