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34663-15-5

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34663-15-5 Usage

General Description

8,9-Dihydro-5H-benzo[7]annulen-6(7H)-one, also known as benzo[7]annulene, is a chemical compound with a bicyclic structure. It is classified as a benzocycloheptatriene and contains a fused seven-membered ring system. Benzo[7]annulene is a yellow, crystalline solid that is insoluble in water but soluble in organic solvents. It is used as a starting material in the synthesis of organic compounds and as a ligand in coordination chemistry. Benzo[7]annulene has potential applications in the development of new materials and pharmaceuticals due to its unique structure and reactivity.

Check Digit Verification of cas no

The CAS Registry Mumber 34663-15-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,4,6,6 and 3 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 34663-15:
(7*3)+(6*4)+(5*6)+(4*6)+(3*3)+(2*1)+(1*5)=115
115 % 10 = 5
So 34663-15-5 is a valid CAS Registry Number.

34663-15-5Relevant articles and documents

Efficient One-Pot Multifunctionalization of Alkynes en Route to α-Alkoxyketones, α-Thioketones, and α-Thio Thioketals by using an Umpolung Strategy

Xu, Zhou,Zhai, Rongliang,Liang, Ting,Zhang, Liming

supporting information, p. 14133 - 14137 (2017/10/16)

The use of polarized synthons is a highly desirable strategy, as it generally enables unprecedented retrosynthetic disconnections for the synthesis of unique substances. Herein, a new approach for α-oxygenated ketones, α-thioketones and α-thio thioketals via an intermolecular umpolung reaction between nucleophiles (alcohols/thioalcohols) and N-alkenoxypyridinium salts, which were generated from the corresponding alkynes, has been developed for the first time. The reactions proceed with good substrate scope and excellent functional group tolerance in one-pot manner. Applications of the products, α-oxygenated ketones, to the synthesis of other valuable synthetic moieties has also been successfully achieved.

New Method for Generation of β-Oxido Carbenoid via Ligand Exchange Reaction of Sulfoxides: A Versatile Procedure for One-Carbon Homologation of Carbonyl Compounds

Satoh, Tsuyoshi,Itoh, Norifumi,Gengyo, Kaoru,Takada, Sae,Asakawa, Naoyuki,et al.

, p. 11839 - 11852 (2007/10/02)

A new procedure for one-carbon homologation of carbonyl compounds is described.The method is based on the rearrangement of β-oxido carbenoid which is generated via the ligand exchange reaction of the sulfinyl group of α-chloro β-hydroxy sulfoxide with tert-butyllithium.Addition of the carbanion of aryl 1-chloroalkyl sulfoxides to carbonyl compounds gave the adducts in good yields.The β-oxido carbenoid rearrangement of the adducts gave one-carbon homologated carbonyl compounds having an α-alkyl substituent.A similar reaction of the adducts derived from carbonyl compounds with chloromethyl p-tolyl sulfoxide yielded a procedure for a methylene insertion.The stereochemistry of the β-oxido carbenoid rearrangenment is also discussed.

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