methyl 2-[[2-[(4S,5S,6S,7R,8R,15R,16R,17S,18S,19S)-5,7,16,18-tetraacetyloxy-21-[2-[(2-methoxy-2-oxoethyl)amino]-2-oxoethyl]-3,20-dioxo-6,17-bis[[(2R,3S,4S,5R,6R)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy]-9,14,27,28-tetraoxa-2,21-diazatetracyclo[20.2.2.14,8.115,19]octacosa-1(25),22(26),23-trien-2-yl]acetyl]amino]acetate 在
potassium cyanide 、
水 作用下,
以
甲醇 为溶剂,
反应 20.0h,
以11%的产率得到2-[[2-[(4S,5S,6S,7R,8R,15R,16R,17S,18S,19S)-21-[2-(carboxymethylamino)-2-oxoethyl]-5,7,16,18-tetrahydroxy-3,20-dioxo-6,17-bis[[(2R,3S,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy]-9,14,27,28-tetraoxa-2,21-diazatetracyclo[20.2.2.14,8.115,19]octacosa-1(25),22(26),23-trien-2-yl]acetyl]amino]acetic acid