Novel syntheses of the carbapenem key intermediates, (3R,4R)-4-acetoxy 3-[(R)-1-(t-butyldimethylsilyloxy)ethyl]-2-azetidinone and (3S,4R)-3-[(R)-1-(t-butyldimethylsilyloxy)ethyl]-4-carboxymethyl-2- azetidinone, from (S)-ethyl lactate

R&D Labs maybe for 127200-91-3

• ZCIC INTERNATIONAL LTD

  Contact:+86-512-56795332

  Address:No227 Shuanglong Rd, Fenghuang, Zhangjiagang

• Wuhan Benjamin Pharmaceutical Chemical Co.,Ltd

  Contact:86-27-52341789

  Address:Room 1518 B suite, optical valley time square, No 111 Guanshan Road, Hongshan District,Wuhan,Hubei Province,China.

• CHEMINN LTD.

  website:http://www.cheminn.com/

  Contact:86-531-67875205

  Address:No.9-2,South of Shanda Road, Jinan ,China

• Borun Chemical Co.,Ltd.

  Contact:+86-574- 87178138; 87297407

  Address:No. 809, Liudingxingzuo, cangsong road, Ningbo, China

• Jinzhou Jiutai Pharmaceutical Co.,Ltd

  Contact:+86-0416-5179890

  Address:No.41, Taianli, Taihe District, Jinzhou, Liaoning