Inventor

TSCHAEN DAVID M

US28 patents

⚠️ This page may combine multiple inventors who share the name “TSCHAEN DAVID M”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

TSCHAEN DAVID M

MERCK & CO INC

Process of preparing phenyl heterocycles useful as COX-2 inhibitors

Process for the preparation of an endothelin antagonist

Oxidaton of primary alcohols to carboxylic acids with a TEMPO catalyst using NaClO2 and NaClO

Process for synthesis of FK-506 and tricarbonyl intermediates

Process for making spirolactone compounds

Oxidation process using tempo

In-situ preparation of diisopinocamphenyl chloroborane

Asymmetric conjugate addition reaction using a chiral additive

Compounds formed by an asymmetric conjugate addition reaction

Synthesis of α-chloro or fluoro ketones

Oxidation process using periodic acid

Deblocking process for allyl esters with regeneratable polymer supported Pd(O)

Process for making spirolactone compounds

Oxidation process using periodic acid

Stereoselective process

Enantioselective synthesis of cyclic amino alcohols

Stereoselective deoxygenation reaction

Process of making spirocycles and analogs thereof

Process for making spirolactone compounds

Asymmetric conjugate addition reaction

Pyridine propanoic acid derivatives

Chiral auxilary for stereoselective alkylations

Enantioselective bioreduction using yeast

Asymmetric bioreduction of 6-bromo-2-tetralone to (s)-6-bromo-2 tetraol by trichosporon capitatum

Asymmetric conjugate addition reaction

Stereoselective synthesis of a chiral cis 3-beta hydrogen (3R) 4-aroyloxy azetidinone

Phosphate-mediated cyclization

MERCK SHARP & DOHME

Process for making reverse transcriptase inhibitors