A facile synthesis of naturally occurring binaphthoquinones: efficient oxidative dimerization of 4-alkoxy-1-naphthols using silver(II) oxide–40% nitric acid
Oxidation of 4-alkoxy-1-naphthols with AgO–40% HNO3 occurred along with a dimerization to give the corresponding bi-1,4-naphthoquinones. The oxidative dimerization required one hydroxyl group and took place at its ortho position. This reaction was applicable to syntheses of naturallyoccurring binaphthoquinones, bivitamin K3 and 3,3′-bijuglone.
[EN] The present invention relates to methods of providing a desired effect to the skin of a mammal using a Maillard initiating reagent with a skin-modifying compound. [FR] La présente invention concerne des procédés permettant d'obtenir un effet souhaité sur la peau d'un mammifère en utilisant une réaction de Maillard avec un composé modifiant la peau.