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alpha,beta-Unsaturated Diazoketones as Platforms in the Asymmetric Synthesis of Hydroxylated Alkaloids. Total Synthesis of 1-Deoxy-8,8a-diepicastanospermine and 1,6-Dideoxyepicastanospermine and Formal Synthesis of Pumiliotoxin 251D
(AMER CHEMICAL SOCWASHINGTON, 2012)
A versatile and concise approach for the stereoselective synthesis of mono-, di-, and trihydroxylated indolizidines is presented in four to six steps from Cbz-prolinal and a diazophosphonate. The key steps involved a Wolff ...
A formal total synthesis of the marine alkaloid aaptamine
(Pergamon-Elsevier Science Ltd, 2008-05)
A new strategy for the synthesis of benzo[de][1,6]naphthyridine derivative 2,3,3a,4,5,6-hexahydroaaptamine, which involves the construction of the isoquinoline ring after elaboration of the quinoline moiety, is described. ...
Cascade cyclization triggered by imine formation. Formal synthesis of the alkaloid (±)-stemoamide and its 9a-epimer
(Elsevier, 2015-10)
A concise formal synthesis of stemoamide ( 1) and its 9a-epimer 14in 5 steps is described featuring a cas-cade cyclization triggered by imine formation. A good selectivity for either epimer is readily accom-plished by ...
Stereoselective total synthesis and enantioselective formal synthesis of the antineoplastic sesquiterpene quinone metachromin A
(Sociedade Brasileira de Química, 1999)
Estudo exploratório sobre a delimitação e práticas contemporâneas da educação não formal
(2013)
This paper presents the survey, demarcation and discussion of different forms of education, which are education unintentional or intentional informal education, which unfolds in formal and non-formal education. The study ...