91813-55-7

Upstream product

• 91813-52-4 (1R,2R,7S,8S)-4-(4-Chloro-phenyl)-5-oxa-3-aza-tricyclo[6.2.1.0^2,7]undeca-3,9-dien-6-one 
• 28562-53-0 4-acetoxy azetidinone 
• 122-01-0 4-chloro-benzoyl chloride 
• 91813-48-8 (1S,2R,3S,4R)-3-(4-Chloro-benzoylamino)-bicyclo[2.2.1]hept-5-ene-2-carboxylic acid 
• 91813-48-8 (1R,2R,3S,4S)-3-(4-Chloro-benzoylamino)-bicyclo[2.2.1]hept-5-ene-2-carboxylic acid 

Relevant academic research and scientific papers

Conversion of N-Acyl-4-acyloxy-β-lactams into 1,3-oxazin-6-ones: Two consecutive pseudopericyclic processes

(equation presented) N-Acyl-4-acyloxy-β-lactams are converted into 1,3-oxazin-6-ones under basic conditions. This transformation is believed to proceed via N-acylazetones, which rearrange to the final products by a sequence of two electrocyclic processes. The calculated (RHF and B3LYP) transrtion structures of both concerted reactions are shown to present characteristic pseudopericyclic orbital topologies.

STEREOCHEMICAL STUDIES -- 79 SYNTHESIS AND KINETIC STUDY ON THE RETRODIENE DECOMPOSITION OF NORBORNENE-CONDENSED 1,3-OXAZIN-4-ONES

The cis-exo-amino acid 3 with norbornene skeleton was converted into 2-aryl-cis-exo-1,3-oxazin-4-ones 5a-d.These compounds, similarly to the diendo isomers 1a-d studied by us earlier, undergo retrodiene decomposition under mild conditions to give 2-aryl-6