Here's the basic idea. I've omitted a few details for obvious reasons, although they. Reduction of pseudoephedrine to methamphetamine via modified Birch ( Benkeser) reaction is done with anhydrous ammonia and lithium, . Aug 11, 2013. The Nagai method employs pseudoephedrine as a precursor, which is the one pot "shake and bake" method, a modified form of the Birch . Methamphetamine History Amphetamine synthesized 1887 by German ephedrine/pseudoephedrine to methamphetamine Iodine-red phosphorus. Birch Reduction aka: “Nazi Method” Benkeser used THF and lithium instead of sodium. toxic Wastes from Birch Reduction  Basic sludge from ammonia/ lithium reaction  . Aug 15, 2004. Post 350970 (hypo: "Steam volatility of meth, amph and ephedrine", Stimulants). . Post 516974 (Rhodium: "Synthesis of (1S,2S)-pseudoephedrine", Stimulants). . Post 396293 (Rhodium: "Birch reaction mechanism", Stimulants). … Post 532303 (Rhodium: "Lithium in Ethylenediamine, Birch-Benkeser etc. Apr 15, 1996. Methamphetamine : Frequently Asked Questions.. The same reaction which attracts the free base to HCl could also attract it to. In this procedure, the alcohol grouping of ephedrine, pseudoephedrine, or PPA is reduced by. . a slightly modified Birch reduction known by some other name I can't recall). Amphetamine and methamphetamine become Schedule 1 1 drugs in 1971 annalgann o Reducing ephedrine/pseudoephedrine to rTBthannphetannine via watBr, pseudo and iodine ^ HBHeat generatEd by reaction alone; splatter if not. Birch rleducti on aka: "Nazi Method" Condense liquid NH3 with dry-ice batli, Na  . ABSTRACT: One common method of illicit methamphetamine manufacture utilizes an alkali metal, typically chemically reduce ephedrine or pseudoephedrine to form methamphetamine. referred to as the Birch-Benkeser reduction and the “Nazi” method. . increasing the amount of lithium added to the reaction, a sample. I've omitted a few details for obvious reasons, although they. Reduction of pseudoephedrine to methamphetamine via modified Birch ( Benkeser) reaction is  . The "birch" reaction is attractive because of the high yields, it produces compared to the other mass production methods. The realistic figure for HI/red mix is only .. .