THE HIGH STEREOSELECTIVE SYNTHESIS OF β-ALKYNYL-ENOL PHOSPHATES
摘要:
A high stereoselective synthesis for beta -allcynyl-enol phosphates from beta -alkynyl ketone and dialkyl phosphite, via Atherton-Todd reaction, was reported. NaH as base gave a nearly pure Z-isomer.
Isomerizations on silica gel: Synthesis of allenyl ketones and the first Nazarov cyclizations of vinyl allenyl ketones
作者:A Stephen、K Hashmi、Jan W Bats、Ji-Hyun Choi、Lothar Schwarz
DOI:10.1016/s0040-4039(98)01619-0
日期:1998.10
chromatographic workup of crude, terminal propargyl ketones 5 on silica gel directly leads to terminal allenylketones 6. When the other substituent on 5 was electron-rich, 7 was observed as side-product. If the other substituent on 5 was electron-poor, the isomeric 1-propynyl ketone 8 was the side-product. Chromatography of the crude propargyl vinyl ketones 10 on silica gel delivers the products of a Nazarov
Hashmi, A. Stephen K.; Choi, Ji-Hyun; Bats, Jan W., Journal fur Praktische Chemie (Weinheim), 1999, vol. 341, # 4, p. 342 - 357
作者:Hashmi, A. Stephen K.、Choi, Ji-Hyun、Bats, Jan W.
DOI:——
日期:——
10.1002/1521-3773(20000703)39
作者:Stephen、Hashmi、Schwarz, Lothar、Choi, Ji-Hyun、Frost, Tanja M.
DOI:10.1002/1521-3773(20000703)39
日期:——
THE HIGH STEREOSELECTIVE SYNTHESIS OF β-ALKYNYL-ENOL PHOSPHATES
作者:Yixiang Ding、Xiaogen Huang
DOI:10.1081/scc-100000538
日期:2001.1
A high stereoselective synthesis for beta -allcynyl-enol phosphates from beta -alkynyl ketone and dialkyl phosphite, via Atherton-Todd reaction, was reported. NaH as base gave a nearly pure Z-isomer.
New Intramolecular Five-Endo-Mode Cyclization of Allenyl Aryl Ketones
作者:Yoshimitsu Nagao、Woo-Song Lee、Kweon Kim
DOI:10.1246/cl.1994.389
日期:1994.2
A convenient preparation of allenyl aryl ketones was achieved by the Weinreb-modified Grignard reaction of N-methoxy-N-methylamides with propargylmagnesium bromide. On treatment with BF3·OEt2, the allenyl aryl ketones were converted to methylenebenzocyclopetenones via a new 5-endo-mode cyclization.