Short: IV/7b
Title: Liquid Crystals: Two-Ring Systems with Bridging Group
Author: Vill, V.
Editor: Thiem, J.
Source: Landolt-Börnstein, New Series
Volume: IV/7b
Year: 1992
Keyword: organic compounds; enthaly of fusion; melting point; phase transition; liquid crystals; glass transition
ISBN: 3-540-55504-8
ISBN: 978-3-540-55504-9
Internet Resource: DOI:10.1007/b46099
RefComment: 10 figs., VIII, 653 pages.
For an example of 1,3-dipolar cycloaddition with an alkene to give an isoxazolidine, see: Org. Synth. Coll., 5, 1124 (1973):
Similarly, regioselective addition to propiolic esters or alkynyl ketones gives isoxazolines: Tetrahedron, 44, 1247 (1988). The regioselectivity of 1,3-dipolar additions of nitrones with electron-deficient alkenes has been studied: J. Org. Chem., 49, 276 (1984).
Reviews: 1,3-Dipolar cycloadditions of nitrones: Synthesis, 205 (1975); The [3+2] nitrone-olefin cycloaddition reaction: Org. React., 36, 1 (1988); Synthetic applications of nitrones: Org. Prep. Proced. Int., 17, 25 (1985).