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21059-42-7

21059-42-7

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  • methyl4-(3-ethoxycarbonyloxy-10,13-dimethyl-7,12-dioxo-2,3,4,5,6,8,9,11,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl)pentanoate

    Cas No: 21059-42-7

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21059-42-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21059-42-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,0,5 and 9 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 21059-42:
(7*2)+(6*1)+(5*0)+(4*5)+(3*9)+(2*4)+(1*2)=77
77 % 10 = 7
So 21059-42-7 is a valid CAS Registry Number.

21059-42-7SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 14, 2017

Revision Date: Aug 14, 2017

1.Identification

1.1 GHS Product identifier

Product name methyl (4R)-4-[(3R,5S,8R,9S,10S,13R,14S,17R)-3-ethoxycarbonyloxy- 10,13-dimethyl-7,12-dioxo-2,3,4,5,6,8,9,11,14,15,16,17-dodecahydr o-1H-cyclopenta[a]phenanthren-17-yl]pentanoate

1.2 Other means of identification

Product number -
Other names 3alpha-Hydroxy-6-oxo-5alpha-cholan-24-oic acid methyl ester 3-acetate

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

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Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:21059-42-7 SDS

21059-42-7Relevant articles and documents

Cyclocholates with 12-Oxo and 7,12-Oxo Groups

Gao, Hongwu,Dias, Jerry Ray

, p. 719 - 724 (2007/10/03)

Syntheses of bile acid cyclooligomers with 12- and 7,12-oxo groups (6a-d, 7a-c, 8a-b) by the Yamaguchi method are described. Cyclotrimerization is the principal reaction route for these cholic acid systems. Conversion of 7- and 12-hydroxy groups in cholic acid (la-b) to oxo groups (4a-c, 5a-c), followed by macrocyclization (6a-d, 7a-c, 8a-b) and selective reduction of the oxo groups back to hydroxy ones without cleaving the 24-carboxylic ester linkages (11) constitutes a new strategy in the synthesis of cyclocholates having unprotected hydroxy groups.

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