XXIV CONTENTS 



X. Distribution, Properties, and Chemistry of the Vitamin K Group 



{contiriued) 



(2) Synthesis of Vitamin K, 831) 



(3) Synthesis of Menadione 839 



o . Properties of the K Vitamins 841 



6 . Standards for the K Vitamins 843 



7. Chemical Structure of the K Vitamins and Vitamin- K-Like Com- 



pounds in Relationship to Biological Activitj' 844 



(1) Effect of Substitution of 2-]VIethyl-l,4-naphthoquinone in Posi- 



tion 3 844 



(2) Effect of Substitution of 1,4-Naphthoquinone in Position 2 with 



Alkyl and /3-Alkenyl Residues 845 



(3) Effect of High Alkylation on the Activity of 1,4-Naphthoqui- 



nones 848 



(4) Effect of Replacement of Naphthoquinones with Carbethoxy 



or Hydroxy Groups 850 



(5) Biological Activity of Naphthoquinone Oxides 851 



(6) Biological Activity of Other Miscellaneous Quinones 853 



(7) Biological Activity of Nai)hthohydroquinone Esters and Pothers 854 



(8) Biological Activity of Hydrides of \'itamin K and of Methyl- 



naphthoquinones 856 



(9) Biological Activity of Methylnaphthols, of Methyltetralones, 



and of Some Related Compounds 858 



Author Index 861 



Plant and Animal Sources of Lipids 895 



Subject Index 913 



