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262601-04-7

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262601-04-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 262601-04-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,6,2,6,0 and 1 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 262601-04:
(8*2)+(7*6)+(6*2)+(5*6)+(4*0)+(3*1)+(2*0)+(1*4)=107
107 % 10 = 7
So 262601-04-7 is a valid CAS Registry Number.

262601-04-7Relevant articles and documents

Total Syntheses of (±)-Anchinopeptolide D and (±)-Cycloanchinopeptolide D

Snider, Barry B.,Song, Fengbin,Foxman, Bruce M.

, p. 793 - 800 (2007/10/03)

The first synthesis of (±)-anchinopeptolide D (4) has been accomplished in seven steps in 10% overall yield from octopamine hydrochloride (17), N-(Boc)glycine (16), and 5-amino-2-hydroxypentanoic acid (22). The key step is the aldol dimerization and hemiaminal formation of α-keto amide 26, which gives primarily protected anchinopeptolide D 27 under kinetically controlled conditions. Cycloanchinopeptolide D (31) has been prepared by the unprecedented head-to-head photodimerization of the two hydroxystyrylamides of 4 using the hydrophobic effect in water to force the two side chains into close proximity so that [2 + 2] cycloaddition is faster than trans to cis double bond isomerization. Coupling of amine 21 with pyroglutamic acid affords the naturally occurring tripeptide 35, which had been assigned glutamic acid structure 34.

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