Synthesis of the Potent Antimalarials Calothrixin A and B
摘要:
[GRAPHICS]A concise synthesis of calothrixins A (1) and B (2) that confirms their assigned structures and affords straightforward synthetic access to them is reported.
Dehalogenation and Barbier-Type Hydroxyalkylation of π-Deficient Haloheterocycles Using Indium
摘要:
The reaction of pi-deficient haloheterocycles with indium metal in water gave corresponding dehalogenated heterocycles. The use of diluted hydrochloric acid instead of water accelerated the reductive reactivity of indium metal. Furthermore, Barbier-type additions proceeded by reactions of alpha-iodoheterocycles with indium in the presence of pivalaldehyde.
It turned out that indium metal was applicable to the dehalogenation of aromatic halides in water. This method is facile and safe compared with the conventional methods such as Pd-C, Raney Ni, or halogen-metal exchange. (c) 2007 Elsevier Ltd. All rights reserved.
79. Antiplasmodial action and chemical constitution. Part VI. Compounds related to lepidylamine