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Silver‐catalyzed N‐aryl‐1H‐pyrazolyl substituted benzenesulfonamide derivatives were obtained regioselectively from ynamides and pyrazoles. In this intermolecular organic transformation, several substituted benzenesulfonamides were obtained in good to excellent yields by forming a new C−N bond under mild reaction conditions. [ABSTRACT FROM AUTHOR]

An efficient intramolecular cyclization reaction was developed to achieve indenone derivatives. The substituted 1,5‐diyenes were converted to the corresponding indenones via a gold‐catalyzed organic transformation, and moderate to excellent yields of the title molecules were obtained via formation of two C=O and one C−C bonds under mild reaction conditions in one pot. [ABSTRACT FROM AUTHOR]

An efficient cascade annulation protocol was established to access substituted 2‐hydroxybenzocarbazoles from alkynylcyclohexadienones and substituted 2‐aminophenols under gold catalysis. In this transformation a new C−C, two C−N bonds were formed sequentially and moderate to excellent yields of 2‐hydroxybenzocarbazole derivatives were obtained selectively via Meyer–Schuster rearrangement in one‐pot. [ABSTRACT FROM AUTHOR]

An efficient gold‐catalyzed synthesis of pyrazolo[1,5‐a]pyridines have been developed from pyrazolo substituted propargyl alcohols via 6‐endo‐dig cyclization. In this intramolecular cyclization reaction a new C−N bond was formed regioselectively and good to excellent yields of pyrazolo[1,5‐a]pyridines were obtained in one‐pot. [ABSTRACT FROM AUTHOR]

An efficient synthetic protocol was developed for the formation of 2‐allylidene 1,3‐diones in very good yields via [3,3]‐sigmatropic rearrangement of O‐propargyl β‐enones. Good yields of highly functionalized substituted furan derivatives were synthesized from O‐propargyl β‐enones under gold‐catalysis via intramolecular cycloisomerisation. We have developed an efficient method for synthesis of several new 2‐allylidene 1,3‐diones in very good yields under thermal condition via [3,3]‐sigmatropic rearrangement. Further, O‐propargyl β‐enones were directly converted to the corresponding substituted furan derivatives under gold‐catalysis via cyclo‐isomerisation. Moderate to good yields of substituted furan derivatives were generated with significant molecule complexity in one‐pot. [ABSTRACT FROM AUTHOR]

An efficient synthetic method was developed to access isoquinoline-derived diene esters from enynones and isoquinoline- N -oxides in an atom-economic manner. The isoquinoline-substituted diene esters were obtained in moderate to excellent yields via [3 + 2]-cycloaddition and isoxazole ring opening followed by a [1,5]-sigmatropic rearrangement reaction, which resulted in one C-C and two C-O bond formations. Further, quinolin-2(1 H )-ylidene-substituted 1,5-diones were achieved by reaction of enynones with quinoline- N -oxides in very good to high yields.