cas 113479-65-5, 7-AMINO-3-CHLOROMETHYL-3-CEPHEM-4-CARBOXYLIC ACID P-METHOXYBENZYL ESTER, HYDROCHLORIDE | Articles data ｜lookchem

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113479-65-5

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Novel efficient preparation method of ceftiofur sulfate intermediate
The invention discloses a novel efficient preparation method of ceftiofur sulfate intermediate. Specifically, the invention relates to a novel efficient preparation method of ceftiofur sulfate intermediate, which relates to a ceftiofur sulfate intermediate shown in formula (II) and the preparation method thereof, the preparation method is short in reaction time and high in yield.
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Paragraph 0010; 0011l 0012

(2017/08/27)

HIGHLY STEREOSELECTIVE METHOXYLATION AT THE SEVEN POSITION OF CEPHALOSPORINS
Addition reaction of methanol to 7-methylsulfeniminocephem 1β-oxide derivatives (6 and 12) under acidic conditions gave exclusively 7β-amino-7α-methoxycephem 1β-oxides (7) stabilized by the formation of an intramolecular hydrogen bond between the 7β-amino and the oxygen atom at the 1-position.
Tsuji, Teruji,Itani, Hikaru,Ishitobi, Hiroyuki
p. 2745 - 2746
(2007/10/02)

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Chemical Properties

Appearance/Colour :Pale yellow solid
Melting Point: 155-157 °C
Boiling Point: 601.1°C at 760 mmHg
Flash Point:317.4°C
Solubility:DMSO (Slightly), Methanol (Slightly)
Storage Temp.:-20°C Freezer
Vapor Pressure: 1E-14mmHg at 25°C
PSA: 107.16000
LogP: 2.91390

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