518990-20-0 Usage
General Description
Pyrano[4,3-c]pyrazole-3-carboxylic acid, 1,4,6,7-tetrahydro- (9CI) is a chemical compound with the molecular formula C9H9N3O3. It belongs to the pyrazole carboxylic acid family and contains a pyrazole ring fused to a pyran ring. Pyrano[4,3-c]pyrazole-3-carboxylic acid, 1,4,6,7-tetrahydro- (9CI) is a bicyclic heterocyclic compound that has potential applications in pharmaceutical and agrochemical industries. It may also have biological activities and can serve as a building block for the synthesis of various drug molecules and other organic compounds. Its unique molecular structure makes it a subject of interest for researchers in the field of medicinal and organic chemistry.
Check Digit Verification of cas no
The CAS Registry Mumber 518990-20-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,1,8,9,9 and 0 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 518990-20:
(8*5)+(7*1)+(6*8)+(5*9)+(4*9)+(3*0)+(2*2)+(1*0)=180
180 % 10 = 0
So 518990-20-0 is a valid CAS Registry Number.
518990-20-0Relevant articles and documents
Synthetic method of 1,4,6,7-tetrahydropyran[4,3-C]pyrazole-3-carboxylic acid
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, (2018/10/02)
The invention discloses a synthetic method of 1,4,6,7-tetrahydropyran[4,3-C]pyrazole-3-carboxylic acid. The synthetic method comprises the following steps: preparing 2-oxo-2-(4.oxotetrahydro-2H-pyran-3-yl)acetate (2) from diethyl oxalate and tetrahydropyranone; carrying out ring closure on 2-oxo-2-(4.oxotetrahydro-2H-pyran-3-yl)acetate (2) and hydrazine hydrate so as to generate 1,4,6,7-tetrahydropyran[4,3-c]pyrazole-3-carboxylic acid ethyl ester (3); and finally, carrying out hydrolysis reaction, so as to obtain a target product, namely 1,4,6,7-tetrahydropyran[4,3-C]pyrazole-3-carboxylic acid. The synthetic method solves the problems of expensive raw materials and low yield in the prior art. The route is mild in conditions and easy for purification, the final product with relatively highyield and high purity is prepared, and the route is suitable for process amplification.
