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Deprotonation of (h 6 -1,2,3-trimethoxybenzene)tricarbonyl chromium with n-BuLi occurs mainly at the C4 carbon while the use of LiTMP gives predominantly the C5-substituted product.La lithiation de l'(h 6 -1,2,3-trimethoxybenzene)tricarbonylchrome avec du n-BuLi s'effectue majoritairement en C4 alors que LiTMP donne principalement le complexe lithie en C5.