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96307-07-2

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96307-07-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 96307-07-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,6,3,0 and 7 respectively; the second part has 2 digits, 0 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 96307-07:
(7*9)+(6*6)+(5*3)+(4*0)+(3*7)+(2*0)+(1*7)=142
142 % 10 = 2
So 96307-07-2 is a valid CAS Registry Number.

96307-07-2Relevant articles and documents

Synthesis of the Dolastatin Thiazole Amino Acid Component (gln)Thz

Holzapfel, Cedric W.,Pettit, George R.

, p. 2323 - 2327 (2007/10/02)

The new thiazole amino acid (gln)Thz, found to occur as one unit of the marine sea hare cyclic pentapeptide dolastin 3, has been synthesized from L-glutamic acid by the route 2 -> 10e.The synthesis of Z-L-isoglutamine (4) was improved by selective ammonolysis of anhydride 3 at -60 deg C.A variety of reaction conditions were found to cause complete racemization during the Hantzsch thiazole synthesis step (9 -> 10).Deuterium labeling experiments indicated loss of the chiral center prior to formation of the thiazole system and suggested an imine-enamine type equilibration involving intermediates A B (Scheme II).The N-benzyloxycarbonyl derivative (10d) of (gln)Thz was partially resolved by employing brucine.

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