Novel 6/8-amido(methoxyglycinyl/alaninyl)dioxathiaphosphocins/dioxaphosphoc
ins (4,7,10) have been synthesized from reactions of monochlorides (3,6,9)
with glycine methyl ester or alanine methyl ester hydrochlorides (1a,b) at
room temperature in dry tetrahydrofuran in the presence of triethylamine.