Through the 1960s to the mid-nineteen eighties, reductive amination was the strategy of choice for clandestine methamphetamine generation. Enterprising biker gangs who dominated the trade at this time mostly ran these operations. (The slang term “crank” for methamphetamine allegedly originated from Biker’s transporting meth in the crankshafts of their bikes.) https://bluecrystalmath36140.full-design.com/blue-crystal-math-no-further-a-mystery-72335222