正丁基锂 、
2,3-Dihydroimidazo[2,1-b]thiazole-6-carboxaldehyde-1(R,S)-oxide 、 4-methoxybenzyl (5R,6R)-6-bromopenem-3-carboxylate 生成
4-methoxybenzyl [5R,6RS,8RS]-6-[acetoxy(2,3-dihydro-1(RS)-oxoimidazo[2,1-b]thiazol-6-yl)methyl]-6-bromopenem-3-carboxylate 、 4-Meteoxybenzyl (5R)-6-[(Z)-(2,3-dihydro-1(RS)-oxoimidazo[2,1-b]thiazol-6-yl)methylene]penem-3-carboxylate