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Beilstein J. Org. Chem. 2023, 19, 646–657, doi:10.3762/bjoc.19.46
Graphical Abstract
Figure 1: Biologically active PBTAs.
Scheme 1: Approaches to PBTAs via annulation of benzothiazoles.
Scheme 2: Approaches to PBTAs via annulation of o-aminothiophenols.
Scheme 3: Approach to PBTAs via radical substitution reaction in 1-(2-bromophenyl)-5-(butylsulfanyl)pyrrolidi...
Scheme 4: Approach to PBTAs via intramolecular cyclizations of 1-(2-thiophenyl)pyrroles.
Scheme 5: A new approach to PBTAs via nucleophile-induced ring contraction in pyrrolo[2,1-c][1,4]benzothiazin...
Figure 2: Electrophilic centers in FPDs.
Scheme 6: Reaction of APBTT 1a with methanol (2a).
Scheme 7: Derivatization of PBTA 3aa.
Scheme 8: Reaction of APBTTs 1a–h with alcohols 2a–c. Isolated yields are given; reaction scale: a mixture of ...
Scheme 9: Side-reaction of APBTTs 1 with alcohols 2.
Scheme 10: Transformations of compounds 5 in solutions.
Scheme 11: Reaction of APBTT 1a with benzylamine.
Scheme 12: Derivatization of PBTA 7a.
Scheme 13: Reaction of APBTTs 1a–h and benzylamine. Isolated yields are given; reaction scale: a mixture of 1 ...
Scheme 14: Reaction of APBTT 1a with an excess of benzylamine.
Scheme 15: Reaction of APBTT 1a with morpholine.
Scheme 16: Reaction of APBTT 1a with aniline (11a).
Scheme 17: Derivatization of PBTA 12aa.
Scheme 18: Reaction of APBTTs 1a–h and arylamines 11a–d. Isolated yields are given; reaction scale: a mixture ...
Scheme 19: Side-reaction of APBTT 1a with arylamine 11b.
Scheme 20: Reaction of APBTT 1a with compounds 16a–d.
Scheme 21: Formation of compounds 17 as an undesired process during the synthesis of APBTTs 1.