i think timothy leary is more along the lines of kayne west than mckenna. he was very much about getting recognized/soaked up the attention/completely brainwashed kids into taking LSD (ruining their lives and minds) for his delusional egomanical urge to fuck with other peoples lives because his was ruined as well (he got shit canned from universities for flying off the deep end about LSD and mind expansion). have you seen the short documentary "Stuff" showing john frusicantes house when he was neck deep in drug addiction back in the early 90s? timothy leary came to his house and told him, "what you're doing is great here! keep it up!". he's absolutely pathetic.
i realize that charles manson is considered the poster child for destroying the 60s scene (and rightfully so), but the true bad guy was timothy leary, imho. he just kept his schtick hidden under taking lsd/cia mind control conspiracies/bogus mind expansion techniques. why he escaped unscathed i'll never know? for someone to be put up on a pedestal simply for throwing bullshit up against the wall in the hope that is sticks is beyond me (and kayne west does this day in and day out as well, he thrives on it)
just ran a quick google search about alexander shulgin and i've seen his books "pihikal" and "tihkal", but haven't read them yet, will try to someday.