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16305-79-6

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16305-79-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 16305-79-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,3,0 and 5 respectively; the second part has 2 digits, 7 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 16305-79:
(7*1)+(6*6)+(5*3)+(4*0)+(3*5)+(2*7)+(1*9)=96
96 % 10 = 6
So 16305-79-6 is a valid CAS Registry Number.

16305-79-6Relevant articles and documents

Preparation of Oxazolidine-Containing Peptides: Unusual Effects in RhIII-Catalyzed Acetalizations of Aldehydes with Urethane-Protected Serine and Threonine Esters and with Dipeptides Containing Serine or Threonine Residues at the N-Terminus

Seebach, Dieter,Sommerfeld, Thimo L.,Jiang, Qiongzhong,Venanzi, Luigi M.

, p. 1313 - 1330 (1994)

The cyclization reaction of aldehydes with Z- and Boc-protected β-hydroxyamino-acid esters (Tables 1 and 2), or of dipeptides containing serine or threonine at the N-terminus (Table 3), to give oxazolidine derivatives, occurs in the presence of isopropyl orthoformate and catalytic amounts of (CF3SO3)3.The reaction may be carried out under kinetic or under thermodynamic control, so that the ratio of the two possible epimeric products can be changed.The protecting group can be removed from the 3-position of the oxazolidine ring, and the resulting NH group can be coupled with another amino acid.Thus, a new method for the preparation of peptides containing β-hydroxy-amino acid-derived oxazolidines ('pseudo-prolines') is available.N-Neopentyl-substituted tripeptides are also described.

Syntheses of ophthalmic acid and its analogues.

Ogata,Ishii

, p. 707 - 710 (2007/10/05)

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