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111136-40-4

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111136-40-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 111136-40-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,1,1,3 and 6 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 111136-40:
(8*1)+(7*1)+(6*1)+(5*1)+(4*3)+(3*6)+(2*4)+(1*0)=64
64 % 10 = 4
So 111136-40-4 is a valid CAS Registry Number.

111136-40-4Relevant articles and documents

Short and efficient chemoenzymatic synthesis of goniothalamin

Gruttadauria, Michelangelo,Lo Meo, Paolo,Noto, Renato

, p. 83 - 85 (2004)

A high-yielding three-step synthesis of goniothalamin involving an enzymatic kinetic resolution in the presence of vinyl acrylate followed by ring-closing metathesis is discussed.

Stereoselective reduction of β,δ-diketo esters. A novel strategy for the synthesis of artificial HMG-CoA reductase inhibitors

Hiyama,Reddy,Minami,Hanamoto

, p. 350 - 363 (2007/10/02)

Condensation of N-methoxy-N-methyl amides with the dianions of acetoacetates gives in good yields β,δ-diketo esters, which are reduced with Et2BOMe-NaBH4 in tetrahydrofuran-methanol highly selectively to give syn-β,δ-dihydroxy esters in one step. Similarly, the β,δ-diketo esters of the Taber's chiral alcohol or its enantiomer respectively are reduced to give syn-β,δ-dihydroxy esters of moderate enantiomeric excess. Higher diastereo- and enantioselectivity were achieved by reduction of the β,δ-diketo esters of the Taber's chiral alcohol or its enantiomer successively with diisobutylalane and with Et2BOMe-NaBH4. The resulting syn-diol esters were hydrolyzed and lactonized to give various types of β-hydroxy-δ-lactones commonly found in artificial HMG-CoA reductase inhibitors.

STUDIES ON THE DIASTEREOSELECTIVE REDUCTION OF β-HYDROXY KETONES TO 1,3-DIOLS WITH COMMON HYDRIDE REAGENTS

Bonini, Carlo,Bianco, Armandodoriano,Fabio,Romano Di,Mecozzi, Sandro,Proposito, Alessandro,Righi, Giuliana

, p. 75 - 80 (2007/10/02)

Some common reducing agents were employed in the diastereoselective reduction of several β-hydroxy ketones to their corresponding syn-1,3-diols.The use of NaBH4 with a Ti(IV) chelating species produced syn diols with a moderate to good selectivity significantly depending upon the reaction conditions chosen (solvent, temperature, nature of the titanium species).The use of LiAlH4 at low temperature, in the presence of LiI, showed a high selectivity for reduction to syn diols, thus demonstrating a possible chelating role of lithium.Some interesting preliminary results have been also obtained in the diastereoselective reduction of MEM-protected β-alkoxy ketones.

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