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1729-20-0

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1729-20-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1729-20-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,7,2 and 9 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1729-20:
(6*1)+(5*7)+(4*2)+(3*9)+(2*2)+(1*0)=80
80 % 10 = 0
So 1729-20-0 is a valid CAS Registry Number.

1729-20-0Relevant articles and documents

HYDROGEN TRANSFER FROM CROTYLTRI-n-BUTYLSTANNANE TO CARBON RADICALS

Keck, Gary E.,Yates, John B.

, p. C21 - C25 (1983)

Attempted reaction of carbon centered radicals with crotyltri-n-butylstannane leads not to C-C bond formation as with 2-propenyltri-n-butylstannane, but to hydrogen abstraction resulting in production of butadiene and tri-n-butylstannyl radicals.

Catalytic Synthesis of Saturated Oxygen Heterocycles by Hydrofunctionalization of Unactivated Olefins: Unprotected and Protected Strategies

Shigehisa, Hiroki,Hayashi, Miki,Ohkawa, Haruna,Suzuki, Tsuyoshi,Okayasu, Hiroki,Mukai, Mayumi,Yamazaki, Ayaka,Kawai, Ryohei,Kikuchi, Harue,Satoh, Yui,Fukuyama, Akane,Hiroya, Kou

supporting information, p. 10597 - 10604 (2016/09/04)

A mild, general, and functional group tolerant intramolecular hydroalkoxylation and hydroacyloxylation of unactivated olefins using a Co(salen) complex, an N-fluoropyridinium salt, and a disiloxane reagent is described. This reaction was carried out at ro

On the understanding of BF3·Et2O-promoted intra- and intermolecular amination and oxygenation of unfunctionalized olefins

Yang, Chun-Hua,Fan, Wen-Wen,Liu, Gong-Qing,Duan, Lili,Li, Lin,Li, Yue-Ming

, p. 61081 - 61093 (2015/08/03)

BF3·Et2O was found to be effective for both intra- and intermolecular amination and oxygenation of unfunctionalized olefins. In the presence of 3 equiv. of BF3·Et2O, intramolecular hydroamination of N-(pent-4-enyl)-p-toluenesulfonamides, N-(hex-5-enyl)-p-toluenesulfonamides, intermolecular hydroamination between sulfonamides and cyclohexene, norbornene or styrene, lactonization of pent-4-enoic acid or hex-5-enoic acid compounds and esterification of cyclohexene with different carboxylic acids all proceeded readily, leading to the corresponding amination or oxygenation products in up to 99% isolated yields. Preliminary NMR experiments and DFT calculations suggested that the intramolecular hydroamination reactions proceeded via a sulfonimidic acid intermediate (N=S-OH), and formation of the corresponding Bronsted acid HF or HBF4 was less likely.

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