In an article, author is Krapcho, AP, once mentioned the application of 21806-61-1, Application In Synthesis of Prop-1-ene-1,3-sultone, Name is Prop-1-ene-1,3-sultone, molecular formula is C3H4O3S, molecular weight is 120.1271, MDL number is MFCD12405143, category is isoquinoline. Now introduce a scientific discovery about this category.
Synthesis of regioisomeric difluoro- and 8-chloro-9-fluorobenz[g]isoquinoline-5,10-diones and SNAr displacements studies by diamines: bis(aminoalkyl)aminobenz[g]isoquinoline-5,10-diones
Convenient pathways have been developed for the synthesis of 6,7-, 6,8-, 7,9- and 8,9-difluorobenz[g] isoquinoline-5, 10-diones and 8 -chloro-9-fluorobenz[g] isoquinoline-5,10-dione. The crucial step in these synthesis involved the Ni-catalyzed coupling of the difluoro- or chlorofluorobenzylic zinc bromides with ethyl 3-chloroisonicotinate or ethyl 4-chloronicotinate. The reactions of the 6,7- or 8,9-difluoro regioisomers with N,N-dimethylethylenediamine led to quaternary salts which were formed by intramolecular displacements from the initial mono displacement products. These cyclizations could be obviated with the use of 3-dimethylaminopropylamine in the displacements which led to the desired bis(aminoalkyl) amino substitution products. Treatment of 8-chloro-9-fluorobenz [g]isoquinoline-5,10-dione with N,N-dimethylethylenediamine led to the regioselective displacement of fluoride. Treatment of this mono substitution product with excess N,N-dimethylethylenediamine led only to the intramolecular cyclization product which was also obtained by reaction of 8,9-difluorobenz[g] isoquinoline-9,10-dione with N,N-dimethyletfiylenediamine. The 6,8- and 7,9-difluoro analogues on treatment with N,N-dimethylethylenediamine or 3-dimethylaminopropylamine led to the expected bis substitution products. (C) 1998 Elsevier Science S.A, All rights reserved.
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Reference:
Isoquinoline – Wikipedia,
,Isoquinoline | C9H7N – PubChem