Bo-Lun Hu

Synthesis of 6-(trifluoromethyl)phenanthridines via palladium-catalyzed tandem Suzuki/C-H arylation reactions.

A palladium-catalyzed tandem Suzuki/C-H arylation reaction of N-aryltrifluoroacetimidoyl chlorides with arylboronic acids has been developed. A variety of 6-(trifluoromethyl)phenanthridines were prepared in moderate to excellent yields from N-(2-bromophenyl)trifluoroacetimidoyl chlorides which can be conveniently prepared from 2-bromoaniline derivatives.

FeCl3-promoted carboxamidation and cyclization of aryl isonitriles with formamides toward phenanthridine-6-carboxamides.

An iron-promoted tandem carboxamidation and cyclization between aryl isonitriles and formamides has been developed. The one-pot strategy can be applied to a wide range of 2-isocyanobiphenyls and formamides with excellent functional group tolerance for the synthesis of phenanthridine-6-carboxamides in moderate to excellent yields.

Synthesis of 2-Sulfenylindenones via One-Pot Tandem Meyer–Schuster Rearrangement and Radical Cyclization of Arylpropynols with Disulfides

A tandem annulation of arylpropynols with disulfides has been developed for the synthesis of 2-sulfenylindenone derivatives. The reaction pathway involves one-pot tandem Meyer-Schuster rearrangement of arylpropynols and successive radical cyclization with disulfides. Various arylpropynols and disulfides with a number of functional groups are compatible in this reaction that affords the corresponding 2-sulfenylindenones in moderate to good yields.

Copper-Catalyzed Three-Component Tandem Cyclization for One-Pot Synthesis of 1,4-Benzothiazines

A copper-catalyzed three-component tandem reaction has been developed for the convenient and practical synthesis of 1,4-benzothiazines. A variety of terminal alkynes and 2-iodo/bromophenyl isothiocyanates underwent this one-pot cyclization with aqueous ammonia to afford 1,4-benzothiazines in moderate to good yields.

Silver nitrate catalysed tandem reactions of o -ethynylanilines with aryl aldehydes: selective one-pot synthesis of bis(indolyl) methanes

Bis(indolyl)methanes are an important class of indole derivatives that have been widely used in medical treatments. A novel silver nitrate-catalysed one-pot synthesis of bis(indolyl)methanes has been developed. In the presence of silver nitrate, cycloisomerisation and bis-addition of o-ethynylanilines with aromatic aldehydes were carried out efficiently to afford the corresponding bis(indolyl)methanes in good to excellent yields.

One-Pot Synthesis of Quinoxalinones via Tandem Nitrosation/Cyclization of N-Aryl Cyanoacetamides

A new one-pot strategy for the synthesis of quinoxalin-2-ones from the tandem nitrosation/cyclization reaction of N-aryl cyanoacetamides with tert-butyl nitrite has been developed. The dehydrogenative N-incorporation is achieved through a sequence of nitrosation, tautomerization, and cyclization, affording quinoxalin-2-ones in moderate to good yields with good functional group tolerance.