I will let you know up front that the chemistry behind what I am about to say next, I don't even understand. The parts that are not for use are in Italics. I understand the basics, but can not preform these things myself yet and do not suggest ANYONE try them. This is for educational purposes only.
I am reading Alexander Shulgin's book PIHKAL, and I thought I would share some things in it. Firstly I will give you a synthesis for something called Homosyringonitrile, which is what is needed for the synthesis of a few different Mescaline type chems. I am only sharing this now because in the book it is not labeled in this order, the Homosyringonitrile synthesis is not its own thing in the book, it is just part of something else.
To a solution of 72.3 g 2,6-dimethoxyphenol in 400 mL MeOH, there was added 53.3 g of a 40% solution of aqueous dimethylamine followed by 40 g of a 40% aqueous solution of formaldehyde. The dark solution was heated under reflux for 1.5 hr on a steambath. The volatiles were then removed under vacuum yielding a dark oily residue of 2,6-dimethoxy-4-dimethylaminomethylphenol. This residue was dissolved in 400 mL of IPA, to which was added 50 mL of methyl iodide. The spontaneously exocthermic reaction (hot) deposited crystal within 3 min, and was allowed to return to room temperature and occasionally stirred over the course of 4 hrs. The solids were removed by filteration, washed with cold IPA, and allowed to air dry yielding 160 g of methiodide of 2,6-domethoxy-4-dimethylaminomethylphenol as a cream colored crystalline solid.
A suspension of 155 g of the above methiodide of 2,6-domethoxy-4-dimethylaminomethylphenol in 600 mL H2O was treated with a solution of 130 g KCN in 300 mL H2O. The reaction mixture was heated on a steam bath for 6 hrs, during which time there was a complete dissolving, the development of a brownish color with a bright blue film on the surface and the walls of the flask, and the gentle evolution of fine gas bubbles. The hot reaction mixture was poured into 1.2 L H2O and acidified with concentrated HCl (careful, HCN evolution). The aqueous solution was extracted with 3x 150 mL CH2Cl2, the extracts pooled, washed with saturated NaHCO3 which removed much of the color. The solvent was removed under vacuum yielding about 70 g of viscous black oil. This was diluted at .4 mm/Hg at 150 degrees Celcius to provide 52.4 g of Homosyringonitrilet as a white oil that spontaneously crystallized to a lustrous white crystal that melted at 57-58 Degrees Celcius.
From here basically any Mescaline type chem can be make.