Abstract: There is described a novel process for producing hydroquinone derivatives of the formula ##STR1## wherein R is an ether protecting group, and their conversion into d-.alpha.-tocopherol, starting from compounds of the formula ##STR2## wherein R is an ether protecting group and R.sup.1 is hydrogen or an ether protecting group.

Abstract: There is described a novel process for the manufacture of hydroquinone derivatives of the formula ##STR1## wherein R represents an ether protecting group, and their conversion into d-.alpha.-tocopherol starting from compounds of the formula ##STR2## wherein R has the above significance.

Abstract: The vitamin D.sub.3 derivative 1.alpha.,25,26-trihydroxycholecalciferol which is useful for regulating the calcium metabolism or calcium transport in the body, cholestene intermediates and a process for their preparation are described.

Abstract: Novel reagents for the determination of Wassermann antibodies comprising a compound selected from those represented by the formula ##STR1## wherein n is a whole number from 12 to 16 inclusive andR is phenyl or substituted phenyl and salts thereof.

Abstract: A process for asymmetrically hydrogenating through the use of microorganisms a double bond connected to tertiary carbon atom in an olefinic aliphatic compound to produce a tertiary, optically active aliphatic compound useful as an intermediate for optically active Vitamins E and K.

Abstract: The present disclosure is directed to 6-lower alkoxy-25,26-(lower alkyl or lower alkylene)methylene dioxy-3,5-cyclocholest-22-ene derivatives which are useful in the manufacture of 25,26-dihydroxycholecalciferol.

Abstract: A process is disclosed for producing (S)-(+)-6-hydroxy-2,5,7,8-tetramethylchroman-2-methanol from either alkyl(R)-2-benzyloxy-3-hydroxy-2-methyl-propionate or (S)-2,2,4-trimethyl-1,3-dioxolan-4-ethanol including intermediates in this synthesis.

Abstract: Novel cholestane derivatives, which can be used as intermediates in the manufacture of 25,26-dihydroxy-cholecalciferol, as well as a process for their preparation is described.

Abstract: A process is disclosed for producing (S)-(+)-6-hydroxy-2,5,7,8-tetramethylchroman-2-methanol from either alkyl(R)-2-benzyloxy-3-hydroxy-2-methyl-propionate or (S)-2,2,4-trimethyl-1,3-dioxolan-4-ethanol including intermediates in this synthesis.

Abstract: A process if disclosed for producing (S)-(+)-6-hydroxy-2,4,7,8-tetramethylchroman-2-methanol from either alkyl(R)-2-benzyloxy-3-hydroxy-2-methyl-propionate or (S)-2,2,4-trimethyl-1,3-dioxolan-4-ethanol including intermediates in this synthesis.

Abstract: A process for asymmetrically hydrogenating through the use of microorganisms a double bond connected to tertiary carbon atom in an olefinic aliphatic compound to produce a tertiary, optically active aliphatic compound useful as an intermediate for optically active Vitamins E and K.

Abstract: Radiation screening preparations comprising a cosmetically acceptable carrier and, as the active ingredient, one or more compounds represented by the formula ##STR1## WHEREIN N IS 1, R.sub.1 is hydrogen, alkyl, alkali metal, ammonium or ammonium substituted with one or more alkyl or hydroxyalkyl residues, R.sub.2 is hydroxymethyl or alkoxymethyl and R.sub.3 is hydrogen; or R.sub.1 and R.sub.2 together constitute a methylene group and R.sub.3 is hydrogen, methyl or ethyl; and wherein n is 2, R.sub.1 is an alkaline earth metal, R.sub.2 is hydroxymethyl or alkoxymethyl and R.sub.3 is hydrogenAnd pharmaceutically acceptable acid addition salts thereof. The preparations may additionally contain other agents which are characterized by a maximum light absorption in the erythemal range. Certain novel compounds are disclosed.