ChemicalBook CAS DataBase List 4-Hydroxy-5-[2,3-O-(1-methylethylidene)-5-O-(triphenylmethyl)-β-D-ribofuranosyl]-1H-pyrazole-3-carboxylic Acid Ethyl Ester

4-Hydroxy-5-[2,3-O-(1-methylethylidene)-5-O-(triphenylmethyl)-β-D-ribofuranosyl]-1H-pyrazole-3-carboxylic Acid Ethyl Ester synthesis

1synthesis methods

Product Name:4-Hydroxy-5-[2,3-O-(1-methylethylidene)-5-O-(triphenylmethyl)-β-D-ribofuranosyl]-1H-pyrazole-3-carboxylic Acid Ethyl Ester
CAS Number:83686-32-2
Molecular formula:C33H34N2O7
Molecular Weight:570.64

Ethyl 3-oxo-4-(triphenylphosphoranylidene)butyrate

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4-Hydroxy-5-[2,3-O-(1-methylethylidene)-5-O-(triphenylmethyl)-β-D-ribofuranosyl]-1H-pyrazole-3-carboxylic Acid Ethyl Ester

83686-32-2
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Yield:-

Steps:

Multi-step reaction with 3 steps
1: 95 percent / acetonitrile / 90 h / Heating
2: 94 percent / tosyl azide, Et₃N
3: 42 percent / NaH / 1,2-dimethoxy-ethane / 3 h / 20 °C

References:

Katagiri, Nobuya;Takashima, Kenichi;Kato, Tetsuzo [Journal of the Chemical Society. Chemical communications,1982,# 12,p. 664 - 665]

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