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135556-98-8

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135556-98-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 135556-98-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,5,5,5 and 6 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 135556-98:
(8*1)+(7*3)+(6*5)+(5*5)+(4*5)+(3*6)+(2*9)+(1*8)=148
148 % 10 = 8
So 135556-98-8 is a valid CAS Registry Number.

135556-98-8Relevant articles and documents

Design, synthesis and bioactivity evaluation of tribactam beta lactamase inhibitors.

Copar, Anton,Prevec, Tadeja,Anzic, Borut,Mesar, Tomaz,Selic, Lovro,Vilar, Mateja,Solmajer, Tom

, p. 971 - 975 (2007/10/03)

Known carbapenem compounds with inhibitory effect towards beta-lactamase enzymes are formed from bicyclical beta lactam structural scaffolds. On the basis of results from theoretical computational methods and molecular modelling we have designed and devel

Synthesis and NMR studies of key intermediates to a new class of β-lactam: The trinems

Marchioro, Carla,Pentassuglia, Giorgio,Perboni, Alcide,Donati, Daniele

, p. 463 - 468 (2007/10/03)

An efficient synthesis of the four isomeric epoxides 4a-d, key compounds to the trinem ring system, starting from (3R,4R,1′R)-(+)-4-acetoxy-3-[1′-(tert-butyldimethylsilyloxy)ethyl] azetidin-2-one 6a is described. All the intermediates have been characteri

Chemistry of O-Silylated Ketene Acetals: An Efficient Synthesis of Carbapenem and 1β-Methylcarbapenem Intermediates

Kita, Yasuyuki,Shibata, Norio,Tohjo, Takashi,Yoshida, Naoki

, p. 1795 - 1800 (2007/10/02)

3-(1-tert-Butyldimethylsiloxyethyl)-4-phenylsulfinylazetidin-2-one reacted smoothly with various types of O-silylated ketene acetals and silylated enol ethers in the presence of a catalytic amount of zinc iodide to give the corresponding trans-4-substitut

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