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155550-73-5

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155550-73-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 155550-73-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,5,5,5 and 0 respectively; the second part has 2 digits, 7 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 155550-73:
(8*1)+(7*5)+(6*5)+(5*5)+(4*5)+(3*0)+(2*7)+(1*3)=135
135 % 10 = 5
So 155550-73-5 is a valid CAS Registry Number.

155550-73-5Relevant articles and documents

Synthetic method of resolving agent hydrogen isopropylidene glycerol phthalate

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Paragraph 0023; 0024; 0025, (2017/01/02)

The invention relates to a resolving agent hydrogen isopropylidene glycerol phthalate. In the method, (S)-(-)-4-chloromethyl-2,2-dimethyl-1,3-dioxolane or (R)-(+)-4-chloromethyl-2,2-dimethyl-1,3-dioxolane is employed as a raw material and is reacted with hydrogen potassium phthalate to generate S/R-hydrogen isopropylidene glycerol phthalate. Compared with the prior art, the resolving agent is prepared directly from a commercial chiral raw material to directly synthesize the resolving agent hydrogen isopropylidene glycerol phthalate in a one-step manner. The raw materials are easy to obtain and are low in cost.

Isopropylidene glycerol hydrogen phthalate: A new resolving agent application to the resolution of 1-arylethylamines

Pallavicini, Marco,Valoti, Ermanno,Villa, Luigi,Piccolo, Oreste

, p. 1117 - 1122 (2007/10/03)

Hydrogen phthalates of (R)- and (S)-isopropylidene glycerol, obtainable from racemic isopropylidene glycerol by reaction with phthalic anhydride and successive resolution with (S)- and (R)-1-phenylethylamine or, alternatively, from (R)- and (S)-isopropylidene glycerol, were regarded as potential new resolving agents A range of important 1-arylethylamines was selected to test their resolving capability. In particular, trial resolutions were carried out using equivalent amounts of racemic amine and hydrogen phthalate of (R)-isopropylidene glycerol The salts of the S isomers selectively crystallized from methanol or 2-propanol allowing to recover the (S)-1-arylethylamines in high chemical and optical yields. Copyright

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