title: The synthesis of 2,2,5-trimethyl-6-hydroxy-2H-naphtho(1,2-b)pyran and 2-( , -dimethylallyl)-3-methylnaphthoquinone. A new route to naphthopyrans and the vitamin K 1  series.
mesh_terms: D000498:Allyl Compounds / Q000138:chemical synthesis; D006900:Hydroxylation; D008722:Methods; D008745:Methylation; D009281:Naphthalenes / Q000138:chemical synthesis; D009285:Naphthoquinones; D011714:Pyrans / Q000138:chemical synthesis*; D014812:Vitamin K / Q000138:chemical synthesis*
chemical_list: D000498:Allyl Compounds; D009281:Naphthalenes; D009285:Naphthoquinones; D011714:Pyrans; D014812:Vitamin K