400843-80-3

Upstream product

• 2937-50-0 Allyl chloroformate 

Downstream Products

• 206272-19-7 3-O-allyloxycarbonyl-6-O-benzyl-2-deoxy-4-O-(1,5-dihydro-3-oxo-3λ⁵-3H-2,4,3-benzodioxaphosphepin-3-yl)-2-(2,2,2-trichloroethoxycarbonylamino)-D-glucopyranosyl trichloroacetimidate 
• 400843-71-2 3-O-allyloxycarbonyl-6-O-benzyl-2-deoxy-4-O-(1,5-dihydro-3-oxo-3λ⁵-3H-2,4,3-benzodioxaphophepin-3-yl)-2-(2,2,2-trichloroethoxycarbonylamino)-α-D-glucopyranosyl trichloroacetimidate 
• 400843-84-7 1-propenyl 3-O-allyloxycarbonyl-6-O-benzyl-2-deoxy-4-O-(1,5-dihydro-3-oxo-3λ⁵-3H-2,4,3-benzodioxaphophepin-3-yl)-2-(2,2,2-trichloroethoxycarbonylamino)-α-D-glucopyranoside 
• 400843-82-5 1-propenyl 3-O-allyloxycarbonyl-6-O-benzyl-2-deoxy-2-(2,2,2-trichloroethoxycarbonylamino)-α-D-glucopyranoside 

Relevant academic research and scientific papers

Synthesis and biological activities of lipid A analogs possessing β-glycosidic linkage at 1-position

New lipid A analogs having acidic groups β-glycosidically linked at the 1-position were synthesized in order to investigate the structural requirement for immunostimulating and endotoxic activity of lipid A. The β-(phosphonoxy)ethyl (PE) and carboxymethyl (CM) analogs of Escherichia coli type having six acyl groups and those of the biosynthetic precursor type having four acyl groups were synthesized via a divergent synthetic route. The E. coli type β-(phosphonoxy)-ethyl analog, which was previously reported to be not endotoxic, showed strong immunostimulating activity comparable to the natural-type α-analog. The acidic functional groups are concluded to be essential but their strict spatial arrangement is not required for expression of the biological activity.

New efficient route for synthesis of lipid A by using affinity separation

New efficient synthesis of lipid A, an immunostimulating glycoconjugate of bacteria, was achieved for the construction of lipid A library by using synthesis based on affinity separation (SAS), where the compounds possessing a barbituric acid (BA)-tag are selectively and rapidly purified by interaction with an artificial receptor for BA. Glycosylation of a glycosyl acceptor possessing the BA-tag with a 4' -phosphorylated N-Troc glucosaminyl trichloroacetimidate gave the disaccharide 4' -phosphate, which was purified by the affinity separation. Successive rémoval of protective groups and introduction of acyl groups were then effected and the synthetic intermediate at each step was purified by the affinity separation. Cleavage of the tag and subsequent deprotection afforded Escherichia coli lipid A. SAS enabled the rapid preparation of lipid A, therefore, proved to be a promising method for synthesis of other complex glycoconjugates.