143159-95-9

Upstream product

• 106-49-0 p-toluidine 
• 15186-48-8 2,3-isopropylidene-glyceraldehyde 
• 1707-77-3 1,2:5,6-di-O-isopropylidene-D-mannitol 

Downstream Products

• 143160-00-3 (3R,4R)-4-((S)-2,2-Dimethyl-[1,3]dioxolan-4-yl)-3-hydroxy-1-p-tolyl-azetidin-2-one 
• 383883-66-7 (+)-(3R,4R)-4-formyl-3-methoxy-1-(p-tolyl)-2-azetidinone 

Relevant academic research and scientific papers

MICROWAVE-INDUCED ORGANIC REACTION ENHANCEMENT CHEMISTRY. 4 CONVENIENT SYNTHESIS OF ENANTIOPURE α-HYDROXY-β-LACTAMS

A convenient and rapid synthesis of enantiopure α-hydroxy-β-lactams using microwave-induced organic reaction enhancement chemistry has been developed.Reactions in domestic microwave ovens, which are very convenient and economical for small scale work in research or teaching laboratories, can also be conducted on a preparative scale of 100 - 500 g in simple beakers or flasks. Key Words: α-Hydroxy-β-lactams, microwave-induced organic reactions, enantiospecific synthesis

Unexpected Formation of 2,2-Dichloro-N-(chloromethyl)acetamides during Attempted Staudinger 2,2-Dichloro-β-lactam Synthesis

In the quest for 3,3-dichloro-β-lactam building blocks, the serendipitous formation of 2,2-dichloro-N-(chloromethyl)acetamides was observed. This peculiar reactivity was investigated in detail, both experimentally and computationally by means of Density Functional Theory (DFT) calculations. 2,2-Dichloro-N-(chloromethyl)acetamides were thus shown to be formed experimentally through reaction of 2,2-dichloroacetyl chloride with glyceraldehyde-derived imines, i. e. (2,2-dimethyl-1,3-dioxolan-4-yl)methanimines, bearing aromatic N-substituents, in the presence as well as in the absence of a base. Deployment of aliphatic imines, however, resulted in complex reaction mixtures, pointing to the importance of a stabilizing aromatic substituent at nitrogen. The DFT results indicate that the substituents can alter the governing equilibria on the one hand and intrinsic barrier heights for the different routes on the other hand, showing that these are controlling the reaction outcome. Furthermore, the 2,2-dichloro-N-(chloromethyl)acetamides proved to be rather unstable in solution and thus difficult to isolate. Nonetheless, their molecular structure was confirmed by means of NMR analysis of several purified analogs and X-ray study of a 4-methoxyphenyl derivative.