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162489-18-1

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162489-18-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 162489-18-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,2,4,8 and 9 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 162489-18:
(8*1)+(7*6)+(6*2)+(5*4)+(4*8)+(3*9)+(2*1)+(1*8)=151
151 % 10 = 1
So 162489-18-1 is a valid CAS Registry Number.
InChI:InChI=1/C8H12O3/c1-8(7(10)11-2)5-3-4-6(8)9/h3-5H2,1-2H3/t8-/m1/s1

162489-18-1SDS

SAFETY DATA SHEETS

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

Version: 1.0

Creation Date: Aug 17, 2017

Revision Date: Aug 17, 2017

1.Identification

1.1 GHS Product identifier

Product name (R)-methyl 1-methyl-2-oxocyclopentanecarboxylate

1.2 Other means of identification

Product number -
Other names methyl (R)-1-methyl-2-oxocyclopentanecarboxylate

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

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

More Details:162489-18-1 SDS

162489-18-1Relevant articles and documents

Catalytic asymmetric intramolecular homologation of ketones with α-diazoesters: Synthesis of cyclic α-Aryl/Alkyl β-ketoesters

Li, Wei,Tan, Fei,Hao, Xiaoyu,Wang, Gang,Tang, Yu,Liu, Xiaohua,Lin, Lili,Feng, Xiaoming

supporting information, p. 1608 - 1611 (2015/01/30)

A catalytic asymmetric intramolecular homologation of simple ketones with α-diazoesters was firstly accomplished with a chiral N,N′-dioxide-Sc(OTf)3 complex. This method provides an efficient access to chiral cyclic α-aryl/alkyl β-ketoesters containing an all-carbon quaternary stereocenter. Under mild conditions, a variety of aryl- and alkyl-substituted ketone groups reacted with α-diazoester groups smoothly through an intramolecular addition/rearrangement process, producing the β-ketoesters in high yield and enantiomeric excess.

Chiral Synthesis via Organoboranes. 42. Selective Reductions. 57. Efficient Kinetic Resolution of Representative α-Tertiary Ketones with B-Chlorodiisopinocampheylborane

Ramachandran, P. Veeraraghavan,Chen, Guang-Ming,Brown, Herbert C.

, p. 88 - 94 (2007/10/03)

Kinetic resolution of racemic α-tertiary ketones with 0.5-0.6 molar equiv of B-chlorodiisopinocampheylborane provides the product alcohols in very high diastereomeric and enantiomeric excess, with the unreacted ketone recovered in very high ee.For example, ethyl 1-methyl-2-oxocyclopentane- and cyclohexanecarboxylates are partially reduced to recover the ketone in 91 to >/=99percent ee and the product alcohols in up to 94percent de, with >90percent ee for the major diastereomer.Bicyclic ketones, such as 1-methyl- and 1-ethylnorcamphor, camphor, and camphenilone, are readily resolved to provide the ketone in 92 to >/=99percent ee, with the product alcohol recovered in high de and ee.Dihydrospirooctane-2,2'(3'H)-furan>-3-one is resolved to provide the ketone in >/=99percent ee and the product alcohol in >/=99percent de.In all the cases studied, the R-isomer of the ketone is recovered when dIpc2BCl is used for kinetic resolution, while lIpc2BCl provides the S-ketone.Optimum conditions for obtaining the product alcohol, or the ketone, or both, in very high yields and ee have been established.

Asymmetric Alkylation Using Chiral Cyclic Diols to Prepare a Quaternary Carbon

Kato, Keisuke,Suemune, Hiroshi,Sakai, Kiyoshi

, p. 3315 - 3326 (2007/10/02)

Asymmetric alkylation of cyclic and acyclic β-keto ester acetals (4, 5, 13, 14, and 18) with C2-symmetric cycloalkane-1,2-dioxy moiety proceeded in a highly diastereoselective manner to afford enol ethers (9-12, 15-17, 19a-c) with a chiral quat

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