This mechanism always results in inversion of configuration.
2.
The closure of the lactam ring in the other monobactams, such as sulfazecin and the nocardicins, may involve a third mechanism involving inversion of configuration at the ?-carbon.
3.
Because of the S N 2 substitution step, the reaction generally works well for inversion of configuration at the alcohol alpha carbon, as is usual with an S N 2 reaction.
4.
The reaction occurs with the inversion of configuration about ribose C 1, thereby forming "'? "'- 5-phosphorybosylamine ( 5-PRA ) and establishing the anomeric form of the future nucleotide.
5.
:Exohydrolysis of the alpha-D-GalA-( 1-> 2 )-alpha-L-Rha bond in rhamnogalacturonan oligosaccharides with initial inversion of configuration releasing D-galacturonic acid from the non-reducing end of rhamnogalacturonan oligosaccharides.
6.
:Exohydrolysis of the alpha-L-Rha-( 1-> 4 )-alpha-D-GalA bond in rhamnogalacturonan oligosaccharides with initial inversion of configuration releasing beta-L-rhamnose from the non-reducing end of rhamnogalacturonan oligosaccharides.
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