The structures of products 10 shown in the schemes of Tables 3 and 4 of the original article1 are incorrect. We have now found, based on X-ray diffraction analysis2 (Figure 1), that those reactions proceed via O-cyclization and not through the N-cyclization pathway originally reported. However, the conclusions of the paper do not change. ORTEP diagram of 10b with thermal ellipsoids at 50 % probability. As a result, the following corrections are needed: 1. Page 100, left column, lines 11–12: “... the corresponding isoindolone- (8) or phenanthridinone-type (10) structures ...” is replaced by “... the corresponding five- (8) or six-membered (10) heterocyclic structures ...”. 2. The term “phenanthridinone” is replaced by “benzo[c]chromen-6-imine” throughout the rest of the paper. 3. Reference [19] is removed. 4. Revised versions of Scheme 1 and Tables 3 and 4 are given here. General outline of the consecutive Sonogashira and oxidative intramolecular nucleopalladation/Heck coupling cascade. 5. Revised names for compounds 10 are provided here (the structure drawings accompanying their spectra have been correspondingly corrected in the Supporting Information): Ethyl (E)-2-[(Z)-6-(phenylimino)-2,3,4,6-tetrahydro-1H-benzo[c]chromen-1-ylidene]acetate (10a), ethyl (E)-2-[(Z)-8,9-dimethoxy-6-(phenylimino)-2,3,4,6-tetrahydro-1H-benzo[c]chromen-1-ylidene]acetate (10b), ethyl (E)-2-{(Z)-6-[(4-methoxyphenyl)imino]-2,3,4,6-tetrahydro-1H-benzo[c]chromen-1-ylidene}acetate (10c), ethyl (E)-2-[(Z)-6-(p-tolylimino)-2,3,4,6-tetrahydro-1H-benzo[c]chromen-1-ylidene]acetate (10d), ethyl (E)-2-{(Z)-6-[(4-chlorophenyl)imino]-2,3,4,6-tetrahydro-1H-benzo[c]chromen-1-ylidene}acetate (10e), ethyl (E)-2-[(Z)-6-(butylimino)-2,3,4,6-tetrahydro-1H-benzo[c]chromen-1-ylidene]acetate (10f). Palladium-catalyzed cycloisomerization reactions of 2-alkynylbenzamides have been shown in various instances to proceed with formation of isoindolone or isoquinolone products via 5-exo- or 6-endo-dig-N-cyclizations, respectively.3 Recently, the alternative 5-exo-dig-O-cyclization mode has also been observed, resulting in the regioselective formation of iminoisobenzofuran derivatives via Pd0-catalyzed cyclization/coupling with aryl halides4 or cyclizative dimerization using CuII as both stoichiometric oxidant and cocatalyst.5 In the present case, the initial heterocyclization of Sonogashira adducts 5 derived from 2 and 3 is followed by an oxidative intramolecular Heck-type coupling (Schemes 1 and 2, where Y = –CONR) leading to 3,4-dihydro-1H-benzo[c]chromen-6(2H)-imine derivatives (10). Incidentally, products 10 contain an isochromen-1-imine core structure, the derivatives of which have attracted significant recent synthetic attention6 not only for being the nitrogen analogues of the biologically important isocoumarins but also because of their own interesting properties.6a,6d Isochromen-1-imines are also the products obtained when the Heck-type coupling is performed intermolecularly.7,8 In any event, in common with the processes leading to iminoisobenzofurans mentioned above,4,5 the Pd-catalyzed formation of 10 from 2-alkynylbenzamides also follows an initial O-cyclization pathway, albeit of the 6-endo-dig type, therefore giving rise to a regiochemically different family of products. An even more fundamental difference arises in the nature of the catalytic cycle, which is shared by products 9 and 10 and incorporates a coupling with a tethered alkene, thus providing a new strategic element in the synthesis of various heterocyclic motifs. Supporting Information (see footnote on the first page of this article): Reproduction of NMR spectra with the corrected structures for compounds 10a–f. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.