33142-25-5 Usage
General Description
Diethyl 4-formyl-2,4-dihydropyran-2,4-dicarboxylate, also known as Diethyl 4-formylmalonate, is a chemical compound with the molecular formula C11H14O5. It is commonly used as a reagent in organic synthesis to introduce the 4-formyl group into various compounds. The compound is a colorless to pale yellow liquid with a fruity odor and is slightly soluble in water but soluble in organic solvents. Diethyl 4-formylmalonate is often used in the synthesis of pharmaceuticals, agrochemicals, and specialty chemicals due to its versatile reactivity in organic reactions. It is also known to be potentially hazardous if ingested, inhaled, or in contact with the skin, and proper protective measures should be taken when handling this compound.
Check Digit Verification of cas no
The CAS Registry Mumber 33142-25-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,3,1,4 and 2 respectively; the second part has 2 digits, 2 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 33142-25:
(7*3)+(6*3)+(5*1)+(4*4)+(3*2)+(2*2)+(1*5)=75
75 % 10 = 5
So 33142-25-5 is a valid CAS Registry Number.
33142-25-5Relevant articles and documents
Reactions of α-chloro β-oxo aldehydes with CH-acid anions
Guseinov, F. I.
, p. 743 - 745 (2007/10/03)
The reactions of α-chloro and α,α-dichloro β-oxo aldehydes with carbanions are accompanied by the cleavage of the carbon-carbon bond in the chloro aldehydes and result in formylation of CH-acids. These electrophiles react with carbanions, which are generated in situ from CH-acids in the presence of AcONa in aprotic solvents, to form polyfunctional hydroxy compounds.
