3141-26-2, Name is 3,4-Dibromothiophene, molecular formula is C4H2Br2S, Recommanded Product: 3141-26-2, belongs to indole-building-block compound, is a common compound. In a patnet, author is Abiedalla, Younis, once mentioned the new application about 3141-26-2.
The compounds in this study are the six regioisomeric 2-, 3-, 4-, 5-, 6- and 7-formyl indoles and the corresponding six regioisomeric N-n-pentylindole aldehydes. These compounds can serve as precursor chemicals and synthetic intermediates for a number of synthetic cannabinoid drugs. These two sets (the six regioisomeric indole aldehydes as well as the six regioisomeric pentylindole aldehydes) each have identical elemental compositions and differ in the position of attachment of the aldehyde group on the indole ring. The electron ionization mass spectra for the indole aldehydes were essentially identical. However, the vapor phase infrared spectra showed differences in the absorption frequencies for the N-H and carbonyl groups based on intramolecular interactions. The associated N-H absorption band occurs as low as 3467 cm(-1) while the free band is as high as 3517 cm(-1). The aldehyde carbonyl band for the indole aldehydes varies from 1713 cm(-1) to 1686 cm(-1). Substitution of the aldehyde group on the pyrrole ring for the N-n-pentylindole aldehydes yields lower carbonyl absorption bands. The EI mass spectra for the pentylindole aldehydes are identical with little information for differentiation among these six regioisomeric compounds. The six compounds were separated on a capillary column using gas chromatography and the elution order appears to be related to the steric crowding of the indole ring substituents.
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Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
,Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles