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140902-67-6

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140902-67-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 140902-67-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,0,9,0 and 2 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 140902-67:
(8*1)+(7*4)+(6*0)+(5*9)+(4*0)+(3*2)+(2*6)+(1*7)=106
106 % 10 = 6
So 140902-67-6 is a valid CAS Registry Number.

140902-67-6Downstream Products

140902-67-6Relevant articles and documents

Samarium(II) Iodide-Induced Reductive Cyclization of Unactivated Olefinic Ketones. Sequential Radical Cyclization/Intermolecular Nucleophilic Addition and Substitution Reactions

Molander, Gary A.,McKie, Jeffrey A.

, p. 3132 - 3139 (2007/10/02)

Samarium(II) iodide in the presence of HMPA effectively promotes the intramolecular coupling of unactivated olefinic ketones by a reductive ketyl-olefin radical-cyclization process.The reaction is quite general for the formation of 5- and 6-membered carbocycles and even provides modest yields in less facile cyclization processes as evidenced by the generation of methylcyclooctanol via an 8-endo cyclization.Sequential radical cyclization-intermolecular nucleophilic addition/substitution processes set the SmI2 reaction apart from its radical-chain, photochemical, and electrochemical counterparts.In addition to delineating the synthetic potential of this reaction, the role played by HMPA in enhancing SmI2 reactivity has been further refined, and a model correlating the high diastereoselectivity and product distribution in SmI2-promoted reductive coupling processes with HMPA concentration has been established.

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