103419-09-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 103419-09-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,3,4,1 and 9 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 103419-09:
(8*1)+(7*0)+(6*3)+(5*4)+(4*1)+(3*9)+(2*0)+(1*9)=86
86 % 10 = 6
So 103419-09-6 is a valid CAS Registry Number.
InChI:InChI=1/C18H23FO2/c1-18-7-6-13-12(14(18)4-5-16(18)21)3-2-10-8-11(20)9-15(19)17(10)13/h8-9,12-14,16,20-21H,2-7H2,1H3/t12-,13+,14+,16+,18+/m1/s1
103419-09-6Relevant articles and documents
Synthesis of 1-haloestradiols
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, (2008/06/13)
Estrogens characterized by an aromatic ring of the formula STR1 are halogenated by electrophilic substitution of a halo atom at the 1-position of the aromatic ring after protection of the sensitive 3-hydroxyl substituent and amination at the 4-position. Preferred starting materials include estrones or derivatives thereof. The estrones are preferably reduced after masking and amination to form the corresponding estradiols, which are then halogenated, deaminated and deprotected to provide the novel 1-haloestradiols.
