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178742-96-6

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178742-96-6 Usage

Structure

An aldehyde derivative with an ethynyl group attached to the fourth position of the cyclohexadiene ring.

Potential applications

a. Building block in organic synthesis
b. Precursor for pharmaceuticals, agrochemicals, and other fine chemicals
c. Materials science
d. Component in electronic devices

Reactivity

Unique due to its structure

Context dependency

Specific properties and applications may vary depending on the specific chemical or industrial context in which it is used.

Check Digit Verification of cas no

The CAS Registry Mumber 178742-96-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,8,7,4 and 2 respectively; the second part has 2 digits, 9 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 178742-96:
(8*1)+(7*7)+(6*8)+(5*7)+(4*4)+(3*2)+(2*9)+(1*6)=186
186 % 10 = 6
So 178742-96-6 is a valid CAS Registry Number.

178742-96-6Downstream Products

178742-96-6Relevant articles and documents

Novel dienes and dienophiles, VI: On the chemical behavior of Z-ethynyl-1,3-butadiene

Hopf, Henning,Jaeger, Helge,Ernst, Ludger

, p. 815 - 824 (2007/10/03)

The behavior of 2-ethynyl-1,3-butadiene (1) as the diene component in Diels-Alder additions has been studied using a selection of representative double and triple bond dienophiles. The latter include maleic anhydride (5a), diethyl fumarate (6), benzoquinone (7), methyl acrylate (11), juglone (20), 1-methylcyclopropene (23), dimethyl acetylenedicarboxylate (26), propiolic aldehyde (32), 4-phenyl-1,2,4-triazolin-3,5-dione (35) and diethyl azodicarboxylate (37). [2 + 4] Cycloadducts were formed in all cases in varying yields. The addition is accompanied by thermal dimerization of 1 which leads to 1,4-diethynyl-4-vinyl-1-cyclohexene (43) and 1,6-diethynyl-1,5-cyclooctadiene (39). The mechanism of this dimerization is discussed. In a competition experiment towards maleic anhydride (5a), diene 1 was shown to be ca. five times less reactive than isoprene. VCH Verlagsgesellschaft mbH, 1996.

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