23262-68-2

Upstream product

• 67-56-1 methanol 
• 186581-53-3 diazomethane 
• 97-30-3 methyl-alpha-D-glucopyranoside 
• 77-78-1 dimethyl sulfate 
• 617-04-9 (2R,3S,4S,5S,6S)-2-(hydroxymethyl)-6-methoxytetrahydro-2H-pyran-3,4,5-triol 
• 91297-94-8 3-O-β-D-glucopyranosyl-(1->2)-<β-D-xylopyranosyl-(1->3)>-β-D-glucopyranosyl-(1->4)-β-D-galactopyranosyl-(25 R,S)-spirost-5-en-3β,14α-diol dodecamethyl ether 

Downstream Products

• 150161-26-5 Acetic acid (2R,3S,4R,5R,6S)-3-acetoxy-2-acetoxymethyl-5-acetylamino-6-((2S,3S,4S,5R,6R)-4-benzyloxy-2,5-dimethoxy-6-methoxymethyl-tetrahydro-pyran-3-yloxy)-tetrahydro-pyran-4-yl ester 
• 150161-10-7 4-Nitrophenyl O-(2-acetamido-2-deoxy-β-D-glucopyranosyl)-(1->2)-O-(4,6-di-O-methyl-α-D-mannopyranosyl)-(1->6)-β-D-glucopyranoside 
• 150161-25-4 Methyl O-(3,4,6-tri-O-acetyl-2-deoxy-2-phthalimido-β-D-glucopyranosyl)-(1->2)-3-O-benzyl-4,6-di-O-methyl-α-D-mannopyranoside 
• 150161-32-3 4-Nitrophenyl O-(2-acetamido-3,4,6-tri-O-acetyl-2-deoxy-β-D-glucopyranosyl)-(1->2)-O-(3-O-acetyl-4,6-di-O-methyl-α-D-mannopyranosyl)-(1->6)-2,3-di-O-acetyl-β-D-glucopyranoside 
• 96038-68-5 methyl-[O⁴,O⁶-dimethyl-O²,O³-bis-(toluene-4-sulfonyl)-α-D-glucopyranoside] 
• 366801-85-6 methyl 2-O-benzyl-3-O-crotonyl-4,6-di-O-methyl-α-D-mannopyranoside 
• 27539-48-6 methyl 2,4,6-tri-O-methyl-α-D-mannopyranoside 
• 6150-07-8 methyl 3,4,6-tri-O-methyl-α-D-mannopyranoside 
• 150161-24-3 Methyl 3-O-benzyl-4,6-di-O-methyl-α-D-mannopyranoside 
• 366801-82-3 methyl 2-O-benzyl-4,6-di-O-methyl-α-D-mannopyranoside 

Relevant academic research and scientific papers

METHYLATION OF METHYL α-D-HEXOPYRANOSIDES WITH DIAZOMETHANE IN THE PRESENCE OF A SMALL AMOUNT OF WATER

The long-time reaction of methyl α-D-gluco-, α-D-manno-, and α-D-galactopyranosides with excess diazomethane-diethyl ether at 25 deg C the presence of water gave all partially methylated methyl α-D-hexopyranosides which differ in number and position of methyl substitution.The presence electrolytes, such as potassium or sodium phosphate, in the reaction medium enhanced the degree of methylation, resulting in preferential formation of tri-O-methyl derivatives of methyl α-D-hexopyranosides.

A FUROSTANOL GLUCURONIDE FROM SOLANUM LYRATUM

A new furostanol glucuronide and three known glycosides, SL-0, aspidistrin and methyl proto-aspidistrin, were isolated from the fresh immature berries of Solanum lyratum.The structure of the new compound was characterized as 26-O-β-D-glucopyranosyl-(22ξ,25R)-3β,22,26-trihydroxyfurost-5-ene 3-O-α-L-rhamnopyranosyl-(1 -> 2)- 3)>-β-D-glucopyranoside. Key Word Index - Solanum lyratum; Solanaceae; furostanol glucuronide.-24β-ethyl-5α-cholesta-7,trans-22,25(27)-trien-3β-ol; spinasteryl-β-D-glucopyranoside.

Five Steroidal Components from the Rhizomes of Polygonatum odoratum var. pluriflorum

Five steroidal components (PO-a(1)-PO-e(5)) were obtained from the methanolic extract or its partial hydrolysate of the fresh rhizomes of Polygonatum odoratum var.Pluriflorum, and their chemical structures were characterized as (25 R and S)-spirost-5-en-3β,14α-diol, 3-O-β-D-glucopyranosyl-(1->2)-3)>-β-D-glucopyranosyl-(1->4)-β-D-galactopyranosyl(=β-lycotetraosyl)-(25 R and S)-spirost-5-en-3β,14α-diol, 3-O-β-lycotetraosyl-22-methoxy-(25 R and S)-furost-5-en-3β,14α,26-triol 26-O-β-D-glucopyranoside, 3-O-β-D-glucopyranosyl-(1->2)-3)>-β-D-glucopyranosyl(1->4)-β-D-galactopyranosyl-22-methoxy-(25 R and S)-furost-5-en-3β,14α,26-triol 26-O-β-D-glucopyranoside and 3-O-β-lycotetraosyl yamogenin, respectively.Moreover, (25 S)-spirost-5-en-3β,14α-diol (7) was isolated from a mixture of the (25 R) and (S) derivatives of PO-a (1) and it was designated as neoprazerigenin A.Keywords - Polygonatum odoratum var. pluriflorum; Liliaceae; neoprazerigenin A; spirostanol glycoside; furostanol glycoside.