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194349-17-2

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194349-17-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 194349-17-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,4,3,4 and 9 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 194349-17:
(8*1)+(7*9)+(6*4)+(5*3)+(4*4)+(3*9)+(2*1)+(1*7)=162
162 % 10 = 2
So 194349-17-2 is a valid CAS Registry Number.

194349-17-2Upstream product

194349-17-2Downstream Products

194349-17-2Relevant articles and documents

Stereoselective Synthesis of Some γ- and δ-Fluoro-α-amino Acids

Kroeger, Stefan,Haufe, Guenter

, p. 1201 - 1206 (2007/10/03)

(R)-(-)-2-Amino-4-fluorobutyric acid (4c) (32percent ee) and six of its homologues 9 have been synthesized by diastereoselective alkylation (54-72percent yield) of (R)-(+)-camphor-based glycine ester imines 1 with 1-bromo-2-fluoro-alkanes 6, at low temperature, followed by deprotection.Similarly 1-bromo-3-fluoropropane was used for the preparation of (R)-(-)-5-fluoronorvaline (4d) (42percent ee).With 1-bromo-2-fluoropropane (6a) and its homologues (prepared by bromofluorination of 1-alkenes) partial resolution occurs in the alkylation step, yielding mixtures of four diastereomers.Using (R)-1-bromo-2-fluoro-4-methylpentane two diastereomeric alkylation products are formed (58percent de).The overall yield of the three-step procedure varied from 10percent to 32percent. - Keywords: Chiral auxiliaries; Glycine ester imines; Alkylations; Bromofluoro alkanes; Triethylamine tris(hydrofluoride)

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