Novel and facile route to (+)-physovenine via intramolecular [2+2]cycloaddition reaction
✍ Scribed by Kozo Shishido; Toshio Azuma; Masayuki Shibuya
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- French
- Weight
- 124 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0040-4039
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## Abstract For Abstract see ChemInform Abstract in Full Text.
The first examples of a Lewis acid catalysed [2+2]cycloaddition between styrenes and naphthoquinones have been observed. The reactions of both methoxyl and acetoxylnaphthoquinones were both regio-and stereospecific. When m-methoxystyrene was employed a novel tetracycle was also formed, and by an une
## Abstract 1,5‐Benzodiazepin‐2‐yl‐phosphonates were facilely synthesized via a one‐pot three‐component condensation of __o__‐diaminobenzene, 1,3‐diketone and diethyl phosphite in the presence of a catalytic amount of ytterbium chloride under mild reaction conditions. © 2010 Wiley Periodicals, Inc.