The mass spectra of reissert compounds

Abstract

A series of Reissert compounds containing the quinoline, isoquinoline and phthalazine nuclei show thecommon feature in their mass spectra of the initial loss of the N-substituent and either of the substituents attached to the adjacent carbon atom.

Electron impact mass spectrometry of N‐(2‐methylpropyl)‐3‐(o‐, m‐ and p‐R‐phenyl)‐2‐propenamidesl

“…The relative abundances of the principal positive ions of compolUlds 1-11 are shown in Table 1. The expected cleavage ato the carboriyl group on the amide fwlction [7] yields the. ions at mlz (102 + R) and mlz (130 + R).…”

Rearrangements Involving alkoxycarbonyl group migration between nitrogen and oxygen.III. Reactions of modified isoquinoline Reissert compounds with aldehydes

“…In their mass spectra the two carbonates show the common feature of the initial loss of ethoxycarbonyl and carbonate groups (73 and 89 mass units respectively) followed by the substituent attached to the C, carbon atom giving rise to the isoquinoline fragment Ion (129-1 r?lle) (30). In the mass spectra of carbinols the molecular ion is also the parent.…”

Sphingomonas paucimobilis complicating vaginal fluid cultivation. A rare case

“…During 1970 Popp and his group [9] examined two almost identical molecules: benzo[a]pyrene, a polycyclic hydrocarbon known to be one of the most lethal carcinogens to humans, and its twin with slight alteration in its molecular structure benzo[e] pyrene. He had illuminated both molecules with ultraviolet (UV) light in an attempt to find exactly what made these two almost identical molecules so different.…”

“…If DNA stored this light, it would naturally emit more light on being unzipped. Exactly the way it happens in the epigenetic process [9,10].…”