Welcome to LookChem.com Sign In|Join Free

CAS

  • or

125315-55-1

Post Buying Request

125315-55-1 Suppliers

Recommended suppliersmore

  • Product
  • FOB Price
  • Min.Order
  • Supply Ability
  • Supplier
  • Contact Supplier

125315-55-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 125315-55-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,5,3,1 and 5 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 125315-55:
(8*1)+(7*2)+(6*5)+(5*3)+(4*1)+(3*5)+(2*5)+(1*5)=101
101 % 10 = 1
So 125315-55-1 is a valid CAS Registry Number.

125315-55-1Downstream Products

125315-55-1Relevant articles and documents

Facile Stereoselective Synthesis of (23S,25R)-1α,25-Dihydroxyvitamin D3 26,23-Lactone, a Major Metabolite of 1α,25-Dihydroxyvitamin D3

Yamamoto, Keiko,Shimizu, Masato,Yamada, Sachiko,Iwata, Suguru,Hoshino, Osamu

, p. 33 - 39 (2007/10/02)

(23S,25R)-1α,25-Dihydroxyvitamin D3 26,23-lactone (1a), a major metabolite of 1α,25-dihydroxyvitamin D3 2, was synthesized efficiently and stereoselectively from 1α-hydroxydehydroepiandrosterone (3).The 17-oxosteroid 3 was first converted to C(22)-steroid aldehyde 9 with the natural stereochemistry at C(17) and C(20) using a stereoselective ene reaction as the key step.Then it was combined with the chiral C5 sulfone 4 having the correct stereochemistry for the lactone in 1a.Sulfone 4 was readily obtained from commercially available (R)-citramalic acid.The side-chain lactone with the natural stereochemistry at C(23) was constructed with high stereoselectivity (84percent) by iodo lactonization of the Δ22-26-carboxylic acid 16b under kinetically controlled conditions in the presence of γ-collidine.The stereoselectivity of the iodo lactonization of steroidal Δ22-25-hydroxy-26-carboxylic acids 16b, 24, and 25 was studied in detail, and a mechanism is proposed in which the configuration at C(25) and an added pyridine base play an important role.

Syntheses of Cholesta-5,7-diene-3β,25-diol and Cholesta-5,7-diene-1α,3β,25-triol

Tachibana, Yoji,Yokoyama, Shinji,Tsuji, Masahiro

, p. 2599 - 2603 (2007/10/02)

Adducts of 3β-acetoxy- and 1α,3β-diacetoxy-23,24-dinorchola-5,7-dien-22-al (7 and 14) with 4-phenyl-3H-1,2,4-triazole-3,5-dione prepared by the ozonolysis of the corresponding adducts of ergosteryl acetate and 1α-acetoxyergosteryl acetate were transformed

Post a RFQ

Enter 15 to 2000 letters.Word count: 0 letters

Attach files(File Format: Jpeg, Jpg, Gif, Png, PDF, PPT, Zip, Rar,Word or Excel Maximum File Size: 3MB)

1

What can I do for you?
Get Best Price

Get Best Price for 125315-55-1