Iodomethane / Methyl iodide
https://en.wikipedia.org/wiki/IodomethaneOrganolithium reagent
https://en.wikipedia.org/wiki/Organolithium_reagentMethyllithium
https://en.wikipedia.org/wiki/MethyllithiumDimethyl carbonate
https://en.wikipedia.org/wiki/Dimethyl_carbonate#Methylating_agentDimethyl sulfate
https://en.wikipedia.org/wiki/Dimethyl_sulfateAlkyl tosylate (MeTs...)
methyl-tosylate-metsSafer but milder alkylating agent (still carcinogenic)
n-BUTYL p-TOLUENESULFONATE - OrgSyn
http://www.orgsyn.org/demo.aspx?prep=cv1p0145Methyl tosylate: finally OTC! [+ its use for many many methylations !] - The Hive
https://chemistry.mdma.ch/hiveboard/novel/000417550.htmlPreparation of methyl tosylate - Sciencemadness
http://www.sciencemadness.org/talk/viewthread.php?tid=11004Methylation with methanal and Zn metal (Eschweiler–Clarke variant)
Eschweiler–Clarke reaction
https://en.wikipedia.org/wiki/Eschweiler%E2%80%93Clarke_reactionSynthèse de la N,N-diméthylbenzylamine - Chimie Organique de A à Z
http://chimieorganique-jeanlouis-migot.over-blog.com/2020/05/179-synthese-de-la-2-3-diphenylquinoxaline.html