title: Au(i)/Ag(i) co-operative catalysis: interception of Ag-bound carbocations with α-gold(i) enals in the imino-alkyne cyclizations with N-allenamides.
abstract: A co-operative Au(i)/Ag(i) catalyst system has been developed to utilize N-allenamides as nucleophilic enal equivalents for the interceptive capturing of incipient carbocations generated through π-acid-triggered imino-alkyne cyclization. The salient features include the in situ generation of silver-bound carbocations (from iminoalkynes), α-gold(i) enals (from N-allenamides) and union of these two species to form indolizines with the regeneration of Au and Ag catalysts.
authors.affiliation: Division of Organic Chemistry, CSIR - National Chemical Laboratory, Dr Homi Bhabha Road, Pune - 411 008, India. n.patil@ncl.res.in and Academy of Scientific and Innovative Research (AcSIR), New Delhi - 110 025, India.
authors.forename: Pradip N
authors.initials: PN
authors.lastname: Bagle
authors.affiliation: Academy of Scientific and Innovative Research (AcSIR), New Delhi - 110 025, India and Division of Physical Chemistry, CSIR - National Chemical Laboratory, Dr Homi Bhabha Road, Pune - 411 008, India.
authors.forename: Manoj V
authors.initials: MV
authors.lastname: Mane
authors.affiliation: Academy of Scientific and Innovative Research (AcSIR), New Delhi - 110 025, India and Division of Physical Chemistry, CSIR - National Chemical Laboratory, Dr Homi Bhabha Road, Pune - 411 008, India.
authors.forename: K
authors.initials: K
authors.lastname: Vanka
authors.affiliation: Academy of Scientific and Innovative Research (AcSIR), New Delhi - 110 025, India and Central NMR Facility, CSIR - National Chemical Laboratory, Dr Homi Bhabha Road, Pune - 411 008, India.
authors.forename: Dinesh R
authors.initials: DR
authors.lastname: Shinde
authors.affiliation: Academy of Scientific and Innovative Research (AcSIR), New Delhi - 110 025, India and Center for Materials Characterization, CSIR - National Chemical Laboratory, Dr Homi Bhabha Road, Pune - 411 008, India.
authors.forename: Samir R
authors.initials: SR
authors.lastname: Shaikh
authors.affiliation: Academy of Scientific and Innovative Research (AcSIR), New Delhi - 110 025, India and Center for Materials Characterization, CSIR - National Chemical Laboratory, Dr Homi Bhabha Road, Pune - 411 008, India.
authors.forename: Rajesh G
authors.initials: RG
authors.lastname: Gonnade
authors.affiliation: Division of Organic Chemistry, CSIR - National Chemical Laboratory, Dr Homi Bhabha Road, Pune - 411 008, India. n.patil@ncl.res.in and Academy of Scientific and Innovative Research (AcSIR), New Delhi - 110 025, India.
authors.forename: Nitin T
authors.identifier: http://orcid.org/0000-0002-8372-2759
authors.initials: NT
authors.lastname: Patil