74193-18-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 74193-18-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,1,9 and 3 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 74193-18:
(7*7)+(6*4)+(5*1)+(4*9)+(3*3)+(2*1)+(1*8)=133
133 % 10 = 3
So 74193-18-3 is a valid CAS Registry Number.
InChI:InChI=1/C27H35NO/c1-21(16-17-25-23(3)13-10-19-27(25,4)5)11-9-12-22(2)18-20-28-26(29)24-14-7-6-8-15-24/h6-9,11-12,14-18H,10,13,19-20H2,1-5H3,(H,28,29)/b12-9-,17-16-,21-11-,22-18-
74193-18-3Relevant articles and documents
Highly Efficient and General Synthetic Method of Various Retinyl Ethers
Lee, Jun Sup,Jeong, Young Cheol,Ji, Minkoo,Baik, Woonphil,Lee, Sijoon,Koo, Sangho
, p. 1937 - 1940 (2007/10/03)
Bromination of 4 by PBr3 under Cu(I) catalyst produces the ambidextrous allylic halide 5 regioselectively and stereoselectively. Hetero nucleophiles distinguish the allylic carbon containing Br from the one containing Cl in 5 to give the heteroatom-substituted C5 allylic chloride 3. The Julia olefination reaction with the C15 sulfone 2 provides diverse retinyl ethers 1.
