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139437-47-1

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139437-47-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 139437-47-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,4,3 and 7 respectively; the second part has 2 digits, 4 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 139437-47:
(8*1)+(7*3)+(6*9)+(5*4)+(4*3)+(3*7)+(2*4)+(1*7)=151
151 % 10 = 1
So 139437-47-1 is a valid CAS Registry Number.

139437-47-1Downstream Products

139437-47-1Relevant articles and documents

Chemoselective and stereoselective synthesis of gem-difluoro-β-aminoesters or gem-difluoro-β-lactams from ethylbromodifluoroacetate and imines during Reformatsky reaction

Boyer, Nicolas,Gloanec, Philippe,De Nanteuil, Guillaume,Jubault, Philippe,Quirion, Jean-Charles

, p. 12352 - 12366 (2008/03/12)

The chemoselective and stereoselective synthesis of gem-difluoro-β-aminoesters or gem-difluoro-β-lactams was investigated from ethylbromodifluoroacetate and imines during Reformatsky reaction. Influence of various reaction parameters, such as nature of the amine part, nature of the chiral auxiliary, was evaluated. High levels of stereoselectivity (up to 98%) were obtained for gem-difluoro-β-aminoesters and gem-difluoro-β-lactams using either (R)-phenylglycinol or (R)-methoxyphenylglycinol.

Studies towards the total synthesis of solanoeclepin A: Synthesis of the 7-oxabicyclo[2.2.1]heptane moiety and attempted seven-membered ring formation

Benningshof, Jorg C. J.,Blaauw, Richard H.,Van Ginkel, Angeline E.,Van Maarseveen, Jan H.,Rutjes, Floris P. J. T.,Hiemstra, Henk

, p. 1693 - 1700 (2007/10/03)

This paper details studies towards the total synthesis of solanoeclepin A (1), the most active natural hatching agent of potato cyst nematodes. The first goal was the preparation of the tetracyclic left-handed substructure 2 in enantiopure form. The 7-oxabicyclo[2.2.1]heptane moiety was obtained via a diastereoselective intramolecular Diels-Alder strategy by using (R)-phenylglycinol as a chiral auxiliary as pioneered by Mukaiyama. A chromium-mediated nickel-catalysed coupling of aldehyde 5 with vinyl triflate 6 gave α,β-unsaturated lactone 18 as a single stereoisomer. The seven-membered ring was expected to arise from a McMurry coupling of dialdehyde 4. Surprisingly, oxidation of diol 24 did not lead to the desired dialdehyde 4, but to the eight-membered ring lactone 25.

Diastereoselective addition of silyl enol ether to chiral imines and 1,3-oxazolidines using a Lewis acid

Higashiyama, Kimio,Kyo, Hideyoshi,Takahashi, Hiroshi

, p. 489 - 490 (2007/10/03)

The Lewis acid promoted reaction of silyl enol ether to chiral imines and 1,3-oxazolidines derived from (R)-phenylglycinol afforded with good diastereoselectivity the (R,R)-β-amino ester derivatives from the imines, and the (R,S)-β-amino ester derivatives from the 1,3-oxazolidines.

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