Intramolecular 1,3-dipolar cycloadditions of dihydroimidazolium ylides: synthesis of pyrrolo[1,2,3-de]quinoxalines and imidazo[1,2-a]indoles
作者:Pedro M. J. Lory、Raymond C. F. Jones、James N. Iley、Simon J. Coles、Michael B. Hursthouse
DOI:10.1039/b605458g
日期:——
an intramolecular 1,3-dipolar cycloaddition reaction that affords (via a reaction cascade involving eliminative ring-opening, recyclisation and prototropic tautomerism) unexpected hexahydropyrrolo[1,2,3-de]quinoxaline products. Steric bulk in both the dihydroimidazole and the dipolarophile allows isolation of an imidazo[1,2-a]indole, the initial product of cycloaddition. When the bromomethyl ketone
Pyrrolo[1,2,3-de]quinoxalines: unexpected products from 1,3-dipolar cycloaddition of dihydroimidazolium ylides
作者:Raymond C.F Jones、James N Iley、Pedro M.J Lory、Simon C Coles、Mark E Light、Michael B Hursthouse
DOI:10.1016/s0040-4039(01)00617-7
日期:2001.6
4,5-Dihydroimidazoles undergo an N-alkylation and 1,3-dipolar cycloaddition cascade with unsaturated α-bromoketones, with subsequent eliminative ring-opening, recyclisation and tautomerisation to form unexpected hexahydropyrrolo[1,2,3-de]quinoxalines.
4,5-二氢咪唑与不饱和α-溴酮进行N-烷基化和1,3-偶极环加成反应,随后消除开环,环化和互变异构现象,形成意外的六氢吡咯并[1,2,3- de ]喹喔啉。
Development and Application of a New General Method for the Asymmetric Synthesis of <i>s</i><i>yn</i>- and <i>a</i><i>nti</i>-1,3-Amino Alcohols
作者:Takuya Kochi、Tony P. Tang、Jonathan A. Ellman
DOI:10.1021/ja0363462
日期:2003.9.1
general method is described for asymmetricsynthesis of both syn- and anti-1,3-amino alcohols. The first application of metalloenamines derived from N-sulfinyl imines is reported for the highlydiastereoselectiveaddition to aldehydes. The reduction of the product beta-hydroxy N-sulfinyl imines 2 with catecholborane and LiBHEt(3) provides syn- and anti-1,3-amino alcohols with very high diastereomeric
Yadav; Reddy, B. V. Subba; Srinivas, Synlett, 2000, # 5, p. 701 - 703
作者:Yadav、Reddy, B. V. Subba、Srinivas、Ramalingam
DOI:——
日期:——
Arylboronic Acid-Catalyzed <i>C</i>-Allylation of Unprotected Oximes: Total Synthesis of <i>N</i>-Me-Euphococcine
作者:Juha H. Siitonen、Padmanabha V. Kattamuri、Muhammed Yousufuddin、László Kürti
DOI:10.1021/acs.orglett.0c00727
日期:2020.3.20
O-Unprotected keto- and aldoximes are readily C-allylated with allyl diisopropyl boronate in the presence of arylboronic acid catalysts to yield highly substituted N-alpha-secondary and tertiary homoallylic hydroxylamines. The method was used in the total synthesis of the trace alkaloid N-Me-Euphococcine.