Oxidation during reductive cyclisations using Bu3SnH
作者:W.Russell Bowman、Harry Heaney、Benjamin M. Jordan
DOI:10.1016/s0040-4020(01)96061-2
日期:1991.1
Reductivecyclisations using Bu3SnH include an “oxidation” step if the removal of an acidic proton from the intermediate cyclised radical, by Bu3SnH acting as a base, is favourable. A “pseudo” SRN1 mechanism is proposed.
如果通过Bu 3 SnH作为碱从中间环化自由基中除去酸性质子是有利的,则使用Bu 3 SnH进行的还原环化包括一个“氧化”步骤。提出了一种“伪” S RN 1机制。
One-Pot Preparation of 2-(Alkyl)arylbenzothiazoles from the Corresponding <i>o</i>-Halobenzanilides
作者:Dan Bernardi、Gilbert Kirsch、Lalla Ba
DOI:10.1055/s-2007-984544
日期:——
: Thionation of o-halobenzanilides was carried out in the presence of Lawesson's reagent. Subsequently, the formed thio-amides reacted with cesium carbonate to give the corresponding benzothiazole derivatives in the same pot.
Intramolecular aromatic substitution (SRN1) reactions; use of entrainment for the preparation of benzothiazoles
作者:W.Russell Bowman、Harry Heaney、Philip H.G. Smith
DOI:10.1016/s0040-4039(00)85581-1
日期:1982.1
The process of entrainment (catalytic chain initiation) with the enolate-anion of acetone has been used in intramolecular aromaticSRN1 subsitution for the preparation of 2-phenyl- and 2-methyl-1,3-benzothiazole in high yield from o-iodothiobenzanilide and o-iodothioacetanilide.
Room-Temperature Ligand-Free Pd/C-Catalyzed C–S Bond Formation: Synthesis of 2-Substituted Benzothiazoles
作者:Yannan Cheng、Qian Peng、Weigang Fan、Pixu Li
DOI:10.1021/jo5002752
日期:2014.6.20
The synthesis of 2-substituted benzothiazoles has been achieved via cyclization of o-iodothiobenzanilide derivatives using Pd/C as the catalyst at room temperature. The protocol is ligand-free, additive-free, and high-yielding and involves very mild conditions.
BOWMAN, W. R.;HEANEY, H.;SMITH, P. H. G., TETRAHEDRON LETT., 1982, 23, N 48, 5093-5096