title: Organocatalytic regiospecific synthesis of 1H-indene-2-carbaldehyde derivatives: suppression of cycloolefin isomerisation by employing sterically demanding catalysts.
abstract: The regiospecific synthesis of 1H-indene-2-carbaldehyde derivatives was achieved through transition-metal-free, reductive cyclisation of ortho-formyl trans-cinnamaldehydes with Hantzsch ester in the presence of an aminocatalyst. In particular, cycloolefin isomerisation of the resulting products could be inhibited efficiently by the introduction of a sterically demanding stereo-defined aminocatalyst.
authors.affiliation: Department of Energy Science, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, South Korea. jwyang@skku.edu.
authors.forename: Hui
authors.identifier: http://orcid.org/0000-0002-2494-4132
authors.initials: H
authors.lastname: Mao
authors.affiliation: Department of Energy Science, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, South Korea. jwyang@skku.edu.
authors.forename: Dong Wan
authors.initials: DW
authors.lastname: Kim
authors.affiliation: Department of Energy Science, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, South Korea. jwyang@skku.edu.
authors.forename: Hun Yi
authors.initials: HY
authors.lastname: Shin
authors.affiliation: Department of Chemistry, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, South Korea. s1673@skku.edu.
authors.forename: Choong Eui
authors.identifier: http://orcid.org/0000-0001-9221-6789
authors.initials: CE
authors.lastname: Song
authors.affiliation: Department of Energy Science, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, South Korea. jwyang@skku.edu.
authors.forename: Jung Woon
authors.identifier: http://orcid.org/0000-0001-8636-0901
authors.initials: JW
authors.lastname: Yang