1985
DOI: 10.1002/chin.198543133
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ChemInform Abstract: A STUDY ON THE PHOTOCHEMICAL DIMERIZATION OF COUMARINS IN THE SOLID STATE

Abstract: Nur 12 von‐28 untersuchten substituierten Cumarinen liefern Photodinlere.

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Cited by 4 publications
(5 citation statements)
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“…2-Phenyl[2-2H]propane (3) was prepared by treatment of 2-bromo-2-phenylpropane9 with lithium aluminum deuteride. This (1) Blanchard, J. S.; England, S. Biochemistry 1983, 22, 5922-5929.…”
Section: Resultsmentioning
confidence: 88%
See 1 more Smart Citation
“…2-Phenyl[2-2H]propane (3) was prepared by treatment of 2-bromo-2-phenylpropane9 with lithium aluminum deuteride. This (1) Blanchard, J. S.; England, S. Biochemistry 1983, 22, 5922-5929.…”
Section: Resultsmentioning
confidence: 88%
“…The aqueous solution was washed with CH2C12 (5x2 mL), and the combined organic extracts were washed with brine (10 mL) and dried (MgS04). The solvent was removed in vacuo to give a yellow solid, which was chromatographed on silica gel (20:1 ethyl acetate/ methanol) to afford 2 as colorless crystals (20.7 mg, 39%): mp 177-9 °C; NMR (CDC13) 5 3.69 (m, 4 H), 3.76 (m, 4 H), 3.84 (m, 4 H), 4.22 (m, 4 H), 6.94 (d, J = 7.8 Hz, 2 ), 7.07 (dt, Jd = 1 Hz, Jt = 7.7 Hz, 2 ), 7.40 (dt, Jd = 2 Hz, Jt = 7.8 Hz, 2 H), 8.15 (dd, J = 2 Hz, J = 7.8 Hz, 2 ), 8.70 (bs, 2 H); IR (CHC13) 3395,1645 cm"1; CIMS m/z (relative intensity) 415 (M+ + 1,100). Crystals of 2 suitable for X-ray crystallographic studies were obtained from hexanes/CH2C12 (1:1) by the isothermal distillation technique, mp 185-186.5 °C.…”
mentioning
confidence: 99%
“…As a result, the enhanced intersystem crossing will photoproducts are formed via a singlet excited state. 14,20,21 Therefore, during the irradiation proconsume these singlet excited state molecules and decrease the fluorescence intensity. Second, cess, the singlet excited state plays an important role for dicarboxylates 3a,b and 4a,b which can CH 2 Cl 2 is a better solvent for 3b than DMSO (the saturation concentration of 3b in CH 2 Cl 2 is form the syn-configurations.…”
Section: G4bmentioning
confidence: 98%
“…Coumarins and their analogues have outstanding property of photochemical and photophysical [149][150][151]. In particular, some coumarin derivatives cause a photoinduced cyclodimerization [152,153] to a cyclobutane-based dimer. The reverse process (photocleavage) can be induced upon irradiation with higher energy photons (wavelength = 254 nm) [154][155][156][157][158].…”
Section: Coumarin Based Polymersmentioning
confidence: 99%