By Thomas F. DeRosa

Advances in man made natural Chemistry and strategies mentioned in US Patents offers artificial instructions for getting ready present and commercially major natural compounds, derivatives, and intermediates as pronounced in issued US Patents. Industries surveyed comprise agrochemical, cosmetics and private care items. each one access includes large info comparable to specific laboratory instructions for getting ready all chemical intermediates and characterization information. moreover, product optimization stories, commercial instruction, and new artificial equipment were incorporated for chosen entries, in addition to projected examine instructions for destiny product improvement. In Advances in man made natural Chemistry and strategies mentioned in US Patents the author's sensible process allows readers to spot learn and marketplace traits, and remain up to date on present advancements within the box. * offers man made guidance for getting ready present and commercially major natural compounds, derivatives, and intermediates as said in issued US Patents * Identifies product improvement developments to aid make sure study components * Elucidates use of the USA Patent and Trademark place of work database

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2% yield. ACIDS AND DERIVATIVES 23 Notes 1. The author also prepared the product from Step 1 in 91% crude yield using di(hydrogenated tallow) formamide as the catalyst. 12 mol) as described in the Step 1 procedure. Tallow is a mixture consisting predominately of C16 H33 , C18 H37 and lesser amounts of C14 H29 , C15 H31 and C17 H35 hydrocarbon chains. 2. Previously N-methylstearylamide was used as an acid halide catalyst using either thionyl chloride or phosgene (1). 3. An alternative method for preparing the product of Step 1 is by the catalytic oxidation of tertiary amines using CuCl2 and either NaI or NH4 I in an atmosphere of 500 psig oxygen and is described (2).

In a subsequent investigation by the author (1) 2-phosphono-3-(3,4-dimethoxyphenyl) methyl-succinic acid and other aromatic derivatives were prepared. 2. Phosphoramidates of the current invention were prepared (2) as illustrated in Eq. 1: i- Benzyl magnesium chloride ii- Carbon tetrachloride, triethylamine, tosyl dibenzyl glutamate, water, 10% palladium on carbon, hydrogen 3. The Step 2 analogue, 2-benzyl-3-phosphonopropanoic acid, has been prepared by the hydrogenation of dibenzyl 3-(dibenzyloxy-phosphono)-2-benzylpropanoate (3) as illustrated in Eq.

ACIDS AND DERIVATIVES R1 Trimethylacetal N-Acetyl-(L)-thioproline N-Acetyl-(L)-thioproline N-Acetyl-(L)-thioproline 11 R2 Phenyl Phenyl Hydrogen Hydrogen R3 2,6-Dichlorobenzylamino 2,6-Dichlorobenzylamino o-Benzoyl o-2,6-Dichlorobenzyl MS (M+1) 435 508 427 495 Notes 1. The preparation of other polyaromatic intermediates of the current invention is described (1). 2. A method for preparing N-acetyl-L-thioproline-(2,6-dichlorobenzyl)-L-tyrosine (I) is provided (2). 3. N-Acetyl-D-thioproline-O-(2,6-dichlorobenzyl)-(E)-didehydotyrosine was also prepared by the author in the current invention and is described.

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