Synthesis of (±)-3,3′-bis(4-hydroxy-2H-benzopyran): a literature correction
摘要:
The synthesis of bisbenzopyran-4-ol (1) was performed through the key steps of iodination, nickel(0)-modified Ullmann-type reaction, hydrogen-transfer hydrogenation and diastereoselective reduction. The X-ray diffraction experiment of compound 9 confirmed that the reported structure in the literature was not the real natural product. (C) 2001 Elsevier Science Ltd. All rights reserved.
Synthesis of (±)-3,3′-bis(4-hydroxy-2H-benzopyran): a literature correction
摘要:
The synthesis of bisbenzopyran-4-ol (1) was performed through the key steps of iodination, nickel(0)-modified Ullmann-type reaction, hydrogen-transfer hydrogenation and diastereoselective reduction. The X-ray diffraction experiment of compound 9 confirmed that the reported structure in the literature was not the real natural product. (C) 2001 Elsevier Science Ltd. All rights reserved.
An efficient synthesis of bisbenzopyrones by a N-heterocycliccarbene (NHC)-catalyzed intramolecular hydroacylation−Stetter reaction cascade has been developed. A series of symmetrical and unsymmetrical bisbenzopyrones were obtained with good to excellent yields. Bisbenzopyran-4-ol was synthesized efficiently.