129544-14-5

Upstream product

• 29750-72-9 6-aminopenicillanic acid p-nitrobenzyl ester 
• 76-83-5 trityl chloride 

Downstream Products

• 129544-37-2 2-[(2R,3R)-2-Acetylsulfanyl-4-oxo-3-(trityl-amino)-azetidin-1-yl]-3-methyl-but-2-enoic acid 4-nitro-benzyl ester 
• 156662-97-4 p-nitrobenzyl 6β-tritylaminopenicillanate 1β-oxide 
• 156663-02-4 p-nitrobenzyl (2R)-3-methyl-2-(4-oxo-5-tritylimino-3-thiazolidynyl)-3-butenoate 
• 156663-04-6 p-nitrobenzyl 3-methyl-2-(4-oxo-5-tritylimino-3-thiazolidynyl)-2-butenoate 

Relevant academic research and scientific papers

FROM PENICILLINS TO 4,5-DIOXOTHIAZOLIDINES: A THERMAL REARRANGEMENT OF TRITYLAMINOPENAM DERIVATIVES

Thermolysis of p-nitrobenzyl 6β-tritylaminopenicillanate 1β-oxide (1) afforded (2R)-3-methyl-2-(4-oxo-5-tritylimino-3-thiazolidinyl)-3-buteonate (8) which could be easily converted into 4,5-dioxothiazolidines (9, 11).The influence of catalytic amounts of