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152398-49-7

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152398-49-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 152398-49-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,2,3,9 and 8 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 152398-49:
(8*1)+(7*5)+(6*2)+(5*3)+(4*9)+(3*8)+(2*4)+(1*9)=147
147 % 10 = 7
So 152398-49-7 is a valid CAS Registry Number.

152398-49-7SDS

SAFETY DATA SHEETS

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

Version: 1.0

Creation Date: Aug 20, 2017

Revision Date: Aug 20, 2017

1.Identification

1.1 GHS Product identifier

Product name (2R)-2-heptyl-2,3-dihydropyran-6-one

1.2 Other means of identification

Product number -
Other names 2H-Pyran-2-one,6-heptyl-5,6-dihydro-,(6R)

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:152398-49-7 SDS

152398-49-7Downstream Products

152398-49-7Relevant articles and documents

Asymmetric Synthesis of α,β-Unsaturated δ-Lactones through Copper(I)-Catalyzed Direct Vinylogous Aldol Reaction

Zhang, Hai-Jun,Yin, Liang

supporting information, p. 12270 - 12279 (2018/09/25)

A simple methodology for the asymmetric synthesis of chiral α,β-unsaturated δ-lactones was achieved by copper(I)-catalyzed direct vinylogous aldol reaction (DVAR) of β,γ-unsaturated esters and various aldehydes, including aromatic aldehydes, heteroaromatic aldehydes, α,β-unsaturated aldehydes, and aliphatic aldehydes. For aromatic and heteroaromatic aldehydes, a one-pot reaction consisting of DVAR, isomerization of the unsaturated carbon-carbon double bond from (E)-form to (Z)-form, and subsequent intramolecular transesterification was required to get the lactones in moderate to high yields with high enantioselectivity. For α,β-unsaturated and aliphatic aldehydes, the DVAR proceeded directly to afford the lactones in moderate yields with high enantioselectivity. In the DVAR, various functional groups were well tolerated. Moreover, the methodology was nicely applicable to the aldehyde group distributed in natural products, derivatives of natural product, and derivatives of drug molecules (atomoxetine and naproxen). The mechanism studies revealed that α-addition was reversible and not favored, which accounted for the excellent regioselectivity in the DVAR. The copper(I)-dienolate species generated through deprotonation was proposed to form an equilibrium with an allylcopper(I) species, which reacted with aldehydes to afford the DVAR products through a catalytic asymmetric allylation of aldehydes. Finally, the robustness of the present reaction was demonstrated by a gram-scale reaction, and the utility of the present methodology was showcased by the formal asymmetric synthesis of ezetimibe and fostriecin.

Enzyme Assisted Synthesis of Enantiomerically Pure δ-Lactones

Haase, Bernhard,Schneider, Manfred P.

, p. 1017 - 1026 (2007/10/02)

Both enantiomers series of a wide variety of optically pure 6-alkylated δ-lactones - saturated as well as unsaturated - were prepared via an enzyme mediated route.The key reaction step is the nucleophilic ring opening of enantiomerically pure alkyl-oxiranes, accessible via the corresponding β-hydroxythioesters which can be obtained enantiomerically pure via enzyme catalyzed kinetic resolutions.

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