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Chiral indoline‐2‐carboxylic acid has been identified to enable a highly enantioselective Catellani‐type annulation of (hetero)aryl, alkenyl triflate and conjugated vinyl iodides with 4‐(bromomethyl)cyclohexanone, directly assembling a diverse range of chiral all‐carbon bridged ring systems. Control experiments and DFT calculations suggest that the coordinating orientation of the chiral amino acid to the arylpalladium(II) center allows for high levels of stereochemical control. [ABSTRACT FROM AUTHOR]

Chiral indoline‐2‐carboxylic acid has been identified to enable a highly enantioselective Catellani‐type annulation of (hetero)aryl, alkenyl triflate and conjugated vinyl iodides with 4‐(bromomethyl)cyclohexanone, directly assembling a diverse range of chiral all‐carbon bridged ring systems. Control experiments and DFT calculations suggest that the coordinating orientation of the chiral amino acid to the arylpalladium(II) center allows for high levels of stereochemical control. [ABSTRACT FROM AUTHOR]

An efficient [4+1] cycloaddition of ortho -hydroxyphenylsubstituted para- quinone methides and sulfur ylides was achieved under the catalyst-free condition. With this developed protocol, a series of trans -2,3-dihydrobenzofurans were obtained in excellent yields (up to 99%) with high diastereoselectivities (>20:1 dr). The usefulness of the protocol was also demonstrated by the versatile conversions of the 2,3-dihydrobenzofurans into other functionalized benzofurans. [ABSTRACT FROM AUTHOR]