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173459-91-1

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173459-91-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 173459-91-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,3,4,5 and 9 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 173459-91:
(8*1)+(7*7)+(6*3)+(5*4)+(4*5)+(3*9)+(2*9)+(1*1)=161
161 % 10 = 1
So 173459-91-1 is a valid CAS Registry Number.

173459-91-1Relevant articles and documents

Stereoselective synthesis of fluorine-containing analogues of anti-bacterial sanfetrinem and LK-157

Mohar, Barbara,Stephan, Michel,Urleb, Uro?

experimental part, p. 4144 - 4149 (2010/07/08)

The synthesis of (1′S,3R,4R)-4-acetoxy-3-(1′-trimethylsilyloxy-2′,2′,2′-trifluoroethyl)-2-azetidinone (10) precursor of modified carbapenems is described relying upon [Ru(C6Me6)(S,S)-(CH2)5NSO2DPEN]-catalyzed asymmetric transfer hydrogenation under dynamic kinetic resolution using HCO2H-Et3N. This fluorine-containing precursor yielded the targeted trinems 1 and 2 via a stereoselective key step condensation with lithium (S)-6-methoxy-cyclohexenolate.

Diastereoselective synthesis of a key intermediate for the preparation of tricyclic β-lactam antibiotics

Matsumoto, Takaji,Murayama, Toshiyuki,Mitsuhashi, Shigeru,Miura, Takashi

, p. 5043 - 5046 (2007/10/03)

Asymmetric synthesis of (S)-5 has been accomplished with an excellent enantiomeric excess by hydrogenation of racemic 5 using ruthenium-BINAP- diamine-KOH system, followed by oxidation. Magnesium enolate of (2S)-2- methoxycyclohexanone [(S)-5] reacts with

The stereoselective synthesis of a key intermediate of the trinem antibiotic Sanfetrinem

Ghiron, Chiara,Piga, Elisabetta,Rossi, Tino,Tamburini, Bruno,Thomas, Russell J.

, p. 3891 - 3894 (2007/10/03)

By modulating the reactivity of the Lewis acid promoter it was possible to obtain, in a single stereoselective condensation step, the methoxyketone 7, an advanced intermediate in the synthesis of Sanfetrinem GV 104326.

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