8 Breneman D, Bronsky EA, Bruce S et al. Cetirizine and astemizole therapy for chronic idiopathic urticaria: a double-blind, placebocontrolled, comparative trial. J Am Acad Dermatol 1995; 33 (2 pt 1):192-8. 9 Kocatürk E, Kavala M, Kural E et al. Autologous serum skin test vs autologous plasma skin test in patients with chronic urticaria: evaluation of reproducibility, sensitivity and specificity and relationship with disease activity, quality of life and anti-thyroid antibodies. Eur J Dermatol 2011; 21:339-43. 10 Godse KV. Autologous serum skin test at various dilutions. Indian J Dermatol 2011; 56:352-3.B.I. and E.G. contributed equally to this work.
One-Pot Synthesis of Piperidines from Imines Using 3-Stannyl-2-(silylmethyl)propene.-The one-pot reaction of aldimines (I) and (V) with 3-stannyl-2-(trimethylsilyl)propene (II), followed by addition of aldehydes is investigated. In the presence of TmsCl as activator single cis isomers of piperidines (IV) are obtained. BF 3 -etherate instead of TmsCl improves significantly the yields of trans products (VII), which are obtained as major isomers. The convenient procedure presented can also be applied to cyclic imines [cf. (VIII)]. The yields of the cycloadducts are higher than in the case of acyclic substrates; however, diastereomeric mixtures of (IX) are formed. -(KANG, K.-T.; KIM, E. H.; KIM, W. J.; SONG, N. S.; SHIN, J. K.; CHO, B. Y.; Synlett (1998) 8, 921-923; Dep. Chem., Pusan Natl. Univ., Pusan 609-735, S. Korea; EN)
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