Skip to product details

Chemical product profile

HONGKUN / PRODUCT DIRECTORY

Diethyl D-(−)-tartrate | CAS 13811-71-7

The (2S,3S) diethyl ester of tartaric acid, used as a chiral tartrate component in documented asymmetric epoxidation chemistry, where D/L identity and ester composition are central selection criteria.

CAS13811-71-7
Molecular formulaC8H14O6
Molecular weight206.19 g/mol

Product overview

D in this product name describes the tartrate stereochemical series; it should not be read as a positive optical-rotation sign. Diethyl D-(−)-tartrate, CAS 13811-71-7, is the (2S,3S) diethyl ester, with two adjacent hydroxyl-bearing stereocentres. It is distinct from the L-(+) enantiomer, meso tartrate and other alkyl esters of tartaric acid. The paired hydroxyl groups give the molecule its relevance as a chiral tartrate ligand in asymmetric synthesis. A procurement brief should therefore identify the stereochemical form and the ethyl ester explicitly. For a proposed grade, enantiomeric composition, other stereoisomeric material and the balance between intact diester and hydrolysed species are more informative than an unspecified 'tartrate purity' claim.

Chemical identity

Chemical name
Diethyl D-(−)-tartrate
CAS number
13811-71-7
Molecular formula
C8H14O6
Molecular weight
206.19 g/mol

Application context

Diethyl D-(−)-tartrate is a chiral component in asymmetric epoxidation, including published Sharpless epoxidation of endiynes and related allylic-alcohol chemistry. Its adjacent hydroxyl groups and 2S,3S configuration contribute to the chiral system. Select the D or L form for the actual substrate and target sequence. Agree stereoisomer, water and ester-composition criteria while keeping the diethyl ester distinct from other tartrate esters.

Chemistry and synthetic role

This is a neutral diester with two vicinal hydroxyl groups, not a tartrate salt. D-(−) corresponds here to (2S,3S); the ethyl groups and both stereocentres must remain explicit when comparing alternatives.

Quality review

Resolve D/L naming unambiguously

Write (2S,3S) alongside D-(−) and CAS; do not use the letter D as a rotation sign.

Separate stereoisomer controls

Ask how the method addresses the opposite enantiomer and relevant meso material.

Review diester composition

For the selected reaction, discuss water, free-acid or monoester-related species and the basis of chemical assay.

Preparing a specification

Specify diethyl D-(−)-tartrate, (2S,3S), CAS 13811-71-7. Set the required chemical and enantiomeric criteria separately; discuss meso content, water and ester-related substances according to the intended asymmetric reaction.

Packaging and storage

Confirm packaging format, net weight and transport arrangements for the selected grade, quantity and destination. Agree storage and handling conditions using the actual supplied material’s SDS and label.

Documentation

Request identity data, COA and SDS. Confirm access to the chiral method, optical-rotation conditions if used, and any water or ester-composition results included in the proposed specification.

Procurement questions

Does D mean dextrorotatory here?

No. The verified product is D-(−), corresponding to (2S,3S).

Can diisopropyl tartrate be ordered under this CAS?

No. This CAS specifies the diethyl ester; another ester requires separate route assessment.

How should the tartrate form be chosen?

Match the D/L configuration and ester group to the substrate and reaction system; confirm water and stereoisomer requirements for that use.

Technical sources
  1. PubChem CID 117410: properties and CAS synonymsNCBI / NLM / NIH
  2. Diethyl D-(−)-Tartrate T1195Tokyo Chemical Industry
  3. Sharpless asymmetric epoxidation of endiynesRSC ChemSpider SyntheticPages
  4. Diethyl tartrateThieme / Synlett