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1427281-83-1

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1427281-83-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1427281-83-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,4,2,7,2,8 and 1 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1427281-83:
(9*1)+(8*4)+(7*2)+(6*7)+(5*2)+(4*8)+(3*1)+(2*8)+(1*3)=161
161 % 10 = 1
So 1427281-83-1 is a valid CAS Registry Number.

1427281-83-1Relevant articles and documents

Highly stereoselective cycloadditions of Danishefsky's diene to (-)-8-phenylmenthyl and (+)-8-phenylneomenthyl glyoxylate N-phenylethylimines

García-Mera, Xerardo,Alves, Maria J.,Goth, Albertino,Do Vale, Maria Luísa,Rodríguez-Borges, José E.

, p. 2909 - 2919 (2013/04/10)

Enantiopure 4-oxo-pipecolic acid derivatives were obtained by double asymmetric induction aza-Diels-Alder reactions between chiral glyoxylate N-phenylethylimines and Danishefsky's diene mediated by zinc iodide. The key to success was the use of iminoacetates possessing two chiral auxiliaries, N-(S)- or N-(R)-1-phenylethyl and (-)-8-phenylmenthyl or (+)-8-phenylneomenthyl. Adducts were formed in good yields (78-81%), with complete regioselectivity and high diastereoselectivity (87-96%). The absolute configuration of the adducts formed was unequivocally assigned through NMR, specific optical rotation and X-ray data of appropriated derivatives. These cycloadducts can serve as precursors for bioactive piperidinic azasugars and pipecolic acid derivatives.

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