67869-13-0 Usage
Uses
2,3,5-Tribromo-4-methylthiophene is a useful synthetic intermediate. It was used in the synthesis of diarylthiopheneacetyl guanidines as selective BACE1 inhibitors. It was also a reagent used to synthesize photochromic dithienylthiazole derivatives.
Check Digit Verification of cas no
The CAS Registry Mumber 67869-13-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,7,8,6 and 9 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 67869-13:
(7*6)+(6*7)+(5*8)+(4*6)+(3*9)+(2*1)+(1*3)=180
180 % 10 = 0
So 67869-13-0 is a valid CAS Registry Number.
67869-13-0Relevant articles and documents
Synthesis and relative diatropicity of a remarkably aromatic thia[13]annulene
Mitchell, Reginald H.,Iyer, Vivekanantan S.
, p. 722 - 725 (1996)
2,4-Bis(bromomethyl)-3-methylthiophene was synthesised as an intermediate to prepare the strained thiophenobenzophanediene 11, which readily thermally valence isomerizes to the novel thia[13]annulene 10. This thia-annulene is notably diatropic and shows about 40% of the ring current of the parent bridged [14]annulene 9, which is substantially more than an analogous oxaannulene, 18, and substantially less than the azaannulene 19.
