Moogy Klingman, 61, musician in Utopia

NEW YORK - If pop music, at its best, can be called a series of evanescent but magically eternal moments, Moogy Klingman lived the concept. He jammed with the likes of Jimi Hendrix, Chuck Berry, and Bo Diddley, produced a rare album featuring Eric Clapton, Jeff Beck, and other superstars, and helped write “Friends,’’ the song that Bette Midler made her theme.