33313-82-5Relevant academic research and scientific papers
Synthesis of chromanes and 4H-chromenes: Exploring the oxidation of 2H-chromenes and dihydro-1-benzoxepines by hypervalent iodine(III)
Ahmad, Anees,Silva, Luiz F.
, p. 3671 - 3677 (2013/02/22)
The reaction of various oxygen-containing benzo-fused cycloalkenes were studied with the hypervalent iodine reagent hydroxy(tosyloxy)iodo]benzene [PhI(OH)OTs, HTIB]. 2H-Chromene and 4-methyl-2H-chromene resulted in substituted 4H-chromene and cis-3,4-dial
Cobalt-mediated Radical Reactions in Organic Synthesis. Oxidative Cyclisations of Aryl and Alkyl Halides leading to Functionalised Reduced Heterocycles and Butyrolactones
Bhandal, Harcharan,Patel, Vinod F.,Pattenden, Gerald,Russell, Jamie J.
, p. 2691 - 2701 (2007/10/02)
Reactions between the CoI species derived from cobalt(III) salen (11) or cobalt(II) salophen (12) and (O-allyl) or (O-but-3-enyl) iodophenols lead to isolatable cobalt complexes, viz. (16) and (27), which can be converted into substituted benzofurans, i.e. (17) and (23), and benzopyrans, i.e. (28) and (34); similarly, interaction between compound (36) and Co1 salen led in one step to 1,3-dimethylindole (37).Radical cyclisation of the acetal (38a) in the presence of Co1 cobaloxime leads to the cis-ring-fused alkyl cobalt complex (42), which can be converted in a preparative manner into lactone (44) following 1,2-elimination and hydrolysis/oxidation, and into lactone (53) following insertion of molecular oxygen , reduction and hydrolysis/oxidation.
SYNTHESIS OF BENZOFURANS, INDOLES AND BENZOPYRANS VIA OXIDATIVE FREE RADICAL CYCLISATIONS USING COBALT SALEN COMPLEXES.
Patel, Vinod F.,Pattenden, Gerald,Russell, Jamie J.
, p. 2303 - 2306 (2007/10/02)
Reactions between the Co(I) species derived from cobalt(III) 'salen'(1), and (O-allyl) or (O-but-3-enyl)iodophenol, leads to isolatable cobalt complexes, viz (2), (13), which can be converted into substituted benzofurans, i.e. (5), (6) and benzopyrans, i.e. (14), (15); similarly interaction between (18) and Co(I) 'salen' led, in one step, to the 3-methylindole (19).
