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70354-71-1

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70354-71-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 70354-71-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,0,3,5 and 4 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 70354-71:
(7*7)+(6*0)+(5*3)+(4*5)+(3*4)+(2*7)+(1*1)=111
111 % 10 = 1
So 70354-71-1 is a valid CAS Registry Number.

70354-71-1Relevant articles and documents

Synthesis of (+)-phenserine using an interrupted Fischer indolization reaction

Schammel, Alex W.,Chiou, Grace,Garg, Neil K.

, p. 725 - 728 (2012)

A concise synthesis of the Alzheimer's therapeutic (+)-phenserine is described. The approach features an interrupted Fischer indolization to construct the pyrrolidinoindoline core, in addition to a classical resolution to arrive at phenserine in enantioenriched form.

Palladium-catalyzed enantioselective domino heck-cyanation sequence: Development and application to the total synthesis of esermethole and physostigmine

Pinto, Artur,Jia, Yanxing,Neuville, Luc,Zhu, Jieping

, p. 961 - 967 (2007/10/03)

An efficient synthesis of functionalized 3-alkyl-3-cyanomethyl-2-oxindole 1 by a palladium-catalyzed domino Heck-cyanation reaction has been developed. Reaction of ortho-iodoanilide 5 with potassium ferro(II)cyanide, K 4[Fe(CN)6], dissolved in DMF in the presence of palladium acetate and sodium carbonate afforded oxindole 1 in good to excellent yields. An enantioselective domino Heck-cyanation process has been developed for the first time using (S)-DIFLUORPHOS as a chiral supporting ligand, and an enantioselectivity of up to 79% ee in the enantiomerically enriched oxindole was obtained under optimized conditions. A concise total synthesis of esermethole and physostigmine, powerful inhibitors of acetyl- and butyryl-cholinesterase, is documented.

2-Azonianorbornene-2-spiro-1'-aziridinium triflate - A novel ethylene immonium ion equivalent: Application to a synthesis of physostigmine

Grieco,Carroll

, p. 4401 - 4404 (2007/10/02)

A unique protocol for either the aminoethylation or the N-methyl aminoethylation of carbonyl compounds featuring the preparation and use of a novel spiroaziridinium salt, 2-azonianorbornene-2-spiro-1'-aziridinium triflate 2, is described.

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