Journal
ORGANIC LETTERS
Volume 7, Issue 15, Pages 3299-3301Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol051126+
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Six new 2-ethoxy-2H-1,2-oxaphosphorin 2-oxides were synthesized with high regioselectivity in good yields via Ag2CO3-Catalyzed cyclization of (2)-2-alken-4-ynylphosphonic monoesters in CH2Cl2 at room temperature. This cyclization of P-OH to substituted alkynes is reported for the first time. The products are a class of phosphorus heterocycles with potential use and are heretofore prepared with difficulty.
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