X=Y-ZH SYSTEMS AS POTENTIAL 1,3-DIPOLES. PART 14. BRONSTED AND LEWIS ACID CATALYSIS OF CYCLOADDITIONS OF ARYLIDENE IMINES OF α-AMINO ACID ESTERS
Cycloadditions of arylidene imines of α-amino acid esters to a range of dipolarophiles show substantial rate enhancements in the presence of Bronsted and Lewis acids.For Bronsted acids the rate is related to the pKa of the acid and cycloadditio
Grigg, Ronald,Gunaratne, H. Q. Nimal,Sridharan, Visuvanathar
p. 5887 - 5898
(2007/10/02)
NEW PROTOTROPIC PROCESSES IN THE SYNTHESIS OF HETEROCYCLIC COMPOUNDS
X=Y-ZH systems are considered in general terms and divided into four classes according to the number of constituent atoms that possess lone pair electrons.Those systems in which the central Y atom possesses a lone pair are shown to be capable of participa
Grigg, R.
p. 593 - 604
(2007/10/02)
Broensted and Lewis Acid Catalysis of X=Y-ZH Cycloadditions
Cycloadditions of arylidene imines of methyl phenylglycinate show substantial rate enhancements in the presence of Broensted and Lewis acids; for Broensted acids the rate is related to the pKa of the acid, whilst for the Lewis acids studied the
Grigg, R.,Gunaratne, H. Q. N.
p. 384 - 386
(2007/10/02)
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