Facile and rapid entry to functionalized and optically active pyrans from tartaric acid by way of 6,8-dioxabicyclo[3.2.1]octanes. Application to the synthesis of (-)-(6S,1'S)-pestalotin

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• Zhejiang Homart Chemical & Technology Co., Ltd.(expird)

  Contact:13587107601

  Address:Cuijiatianpu,Quzhou, Zhejiang, China (Mainland)

• Shanghai Profirst Co., Ltd.

  Contact:+86-21-38122007

  Address:2, Lane 1123, Kangqiao Road, Pudong New Area, Shanghai

• Shanghai Longjin Metallic Material Co., Ltd.

  website:http://www.shlongjin.cn/

  Contact:021-56517503,56502257

  Address:No.16, Lane 555, Chengyin Road, Shanghai

• Chongqing Werlchem Fine Chemical Co. Ltd

  Contact:+86-23-67521957

  Address:NO.15,Fortune Road,Yubei District,401121,Chongqing,China

• Zhejiang Haizhou Pharmaceutical Co., Ltd.

  website:https://www.haizhoupharma.com/

  Contact:+86-576-88221016

  Address:No. 19, Donghai 5th Avenue, Yanhai Industrial Zone, Linhai, Zhejiang, China