A new reagent for solid and solution pha
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Yaw Fui Yong; Jennifer A. Kowalski; Jason C. Thoen; Mark A. Lipton
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Article
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1999
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Elsevier Science
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French
โ 217 KB
A new reagent --4-nitro-l-H-pyrazole-l-[N, N'-bis(ten-butoxycarbonyl)]cmboxamidine --has been develolxd to effect the rapid a~l efficient synthesis of I~(~)-pmtected guanidin~ from and secendm3, amines. The reagent is a more eleclrophilic, sad comfy more derivative of the literature reagent l-H-pyra