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J. Hu, L.-Y. Wu, X.-C. Wang, Y.-Y. Hu, Y.-N. Niu, X.-Y. Liu, S. Yang and Y.-M. Liang, “Phase-Transfer-Cata- lyzed Intramolecular Cyclization of ortho-Alkynyl Phenyl Ether Derivatives for Synthesis of 2,3-Disubstituted Ben- zo[b]furans,” Advanced. Synthesis &. Catalysis, Vol. 352, No. 2-3, 2010, pp. 351-356.

has been cited by the following article:

• TITLE: Phase-Transfer-Catalyzed Intramolecular Hydroaryloxylation and Hydroamination of C≡C Triple Bonds: An Efficient Synthesis of Benzo[b]furan and 3-Methyleneisoindoline-1-one Derivatives

  AUTHORS: Jie Hu, Lei Liu, Xiangchuan Wang, Yuanyuan Hu, Shangdong Yang, Yongmin Liang

  KEYWORDS: PTC, Intramolecular, Cyclization, Metal-Free

  JOURNAL NAME: Green and Sustainable Chemistry, Vol.1 No.4, November 16, 2011

  ABSTRACT: Phase-transfer-catalyzed intramolecular cyclization reaction of forming benzo[b]furan and 3-methyleneisoin- doline-1-one derivatives has been developed. The cyclization reaction of propargylic carbonates was also de- scribed under metal-free condition and the reaction was reported by Pd and Ni before. The reaction condi- tions and the scope of the process are examined. The catalysts are cheap and environmentally friendly and the substrates are readily available and the procedure is simple, rapid, and general. The development of C-O and C-N bond formation processes via an overall structural isomerization represents the most atom-eco- nomical approach.