Electron impact mass spectrometry of 2-hydroxymethyl-3,4,5,6,7,8-hexahydro-2H-1-benzopyran-5-ones. The unusual presence of [MH3O]+ species in the fragmentation pattern of 4-phenyl derivatives
AbstractThe mass spectrometric behaviour of some 2‐hydroxymethyl‐3,4,5,6,7,8‐hexahydro‐2H‐1‐benzopyran‐5‐ones is described and discussed with the aid of exact mass measurements, linked scans, labelling experiments and low electron energy measurements. The unusual presence of abundant [MH3O]+ species in the mass spectra of 4‐phenyl substituted compounds is discussed in detail and a mechanism is proposed.
Synthesis of Heterocycles Utilizing N2-TiCl4-Li-TMSCl
作者:Masanori Hori、Miwako Mori
DOI:10.1021/jo00111a001
日期:1995.3
Rao, C. Seshu Sekhara; Rajagopalan, K.; Swaminathan, S., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1982, vol. 21, # 8, p. 753 - 754
作者:Rao, C. Seshu Sekhara、Rajagopalan, K.、Swaminathan, S.