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69471-28-9

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69471-28-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 69471-28-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,9,4,7 and 1 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 69471-28:
(7*6)+(6*9)+(5*4)+(4*7)+(3*1)+(2*2)+(1*8)=159
159 % 10 = 9
So 69471-28-9 is a valid CAS Registry Number.

69471-28-9Relevant articles and documents

Revisiting Arene C(sp2)?H Amidation by Intramolecular Transfer of Iridium Nitrenoids: Evidence for a Spirocyclization Pathway

Hwang, Yeongyu,Park, Yoonsu,Kim, Yeong Bum,Kim, Dongwook,Chang, Sukbok

supporting information, p. 13565 - 13569 (2018/09/25)

Two mechanistic pathways, that is, electrocyclization and electrophilic aromatic substitution, are operative in most intramolecular C?H amination reactions proceeding by metal nitrenoid catalysis. Reported here is an alternative mechanistic scaffold leading to benzofused δ-lactams selectively. Integrated experimental and computational analysis revealed that the reaction proceeds by a key spirocyclization step followed by a skeletal rearrangement. Based on this mechanistic insight, a new synthetic route to spirolactams has been developed.

Conversion of 7-Methoxy-3,4-dihydro-2H-1-benzopyran-2-one into the corresponding dimethyl ortho ester

Bourke, David G.,Collins, David J.

, p. 3863 - 3878 (2007/10/03)

7-Methoxy-3,4-dihydro-2H-1-benzopyran-2-one 2 was converted into 3-(2'-tert-butyldimethylsilyloxy-4'-methoxyphenyl)-N-methyl-N-phenylpropanamide 25 and reaction of this with methyl trifluoromethanesulfonate, followed by reaction with sodium methoxide, gave 2,2,7-trimethoxy-2H- 1-benzopyran 1a in 55% overall yield from 25. A similar methylation/methoxide sequence using 3-(2'-benzyloxy-4-methoxyphenyl)-N-methyl-N-phenylpropanamide 18 gave a mixture which contained trimethyl 3-(2'-benzyloxy-4'-methoxyphenyl)orthopropanoate 20a and reaction of this mixture with a solution of sodium in tert-butanol gave a product in which 2,2,7-trimethoxy-2H-1-benzopyran 1a was detected, but not isolable.

EFFICIENT, HIGHLY REGIOSELECTIVE FRIES REARRANGEMENTS OF METHYL 3-(2-ACYLOXY-4-METHOXYPHENYL)PROPANOATES: THE FIRST TOTAL SYNTHESIS OF THE LINEAR ACYLATED COUMARINS GEIJERIN AND DEHYDROGEIJERIN.

Cairns, Nicholas,Harwood, Laurence M.,Astles, David P.

, p. 1311 - 1314 (2007/10/02)

Aluminium chloride catalysed para-Fries rearrangement of methyl 3-(2-acyloxy-4-methoxyphenyl)propanoates (5) in nitromethane furnishes the corresponding 5-acylated products (6) cleanly and in high yield.The rearrangement products may be converted into 6-a

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