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1072145-51-7

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1072145-51-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1072145-51-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,7,2,1,4 and 5 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1072145-51:
(9*1)+(8*0)+(7*7)+(6*2)+(5*1)+(4*4)+(3*5)+(2*5)+(1*1)=117
117 % 10 = 7
So 1072145-51-7 is a valid CAS Registry Number.

1072145-51-7Relevant articles and documents

Multigram synthesis of glyceollin i

Luniwal, Amarjit,Malik, Neha,Erhardt, Paul,Khupse, Rahul,Reese, Michael,Liu, Jidong,El-Dakdouki, Mohammad,Fang, Lei

, p. 1149 - 1162 (2012/01/05)

Scaled-up procedures and preparation of glyceollin I in multigram quantities are described. The synthesis features construction of a cis-fused ring system in high enantiomeric excess after Sharpless asymmetric dihydroxylation of a key intermediate that is initially produced by an intramolecular Wittig reaction to afford the requisite alkene while simultaneously forming the first ring. The overall yield is 12% after 11 steps.

Total syntheses of racemic and natural glycinol

Luniwal, Amarjit,Khupse, Rahul S.,Reese, Michael,Fang, Lei,Erhardt, Paul W.

scheme or table, p. 2072 - 2075 (2010/04/29)

Total syntheses of racemic and (-)-glycinol (1) are described. A Wittig reaction produced the isoflav-3-ene from which a Sharpless dihydroxylation introduced either the racemic or enantiomeric 6a-hydroxy group. A 5.5% overall yield of racemic material was obtained after 12 steps. A method was devised for a one-pot switch of protecting groups masking a sensitive resorcinolic para-functionality, and conditions were optimized to prompt spontaneous closure of the pterocarpanolic dihydrofuran upon subsequent exposure of its ortho-functionality. These improvements eliminated two steps and increased the overall yield to 9.8% during production of the natural enantiomer.

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