New diarylmethanofullerene derivatives and their properties for organic thin- film solar cells

• Daisuke Sukeguchi,
• Surya Prakash Singh,
• Mamidi Ramesh Reddy,
• Hideyuki Yoshiyama,
• Rakesh A. Afre,
• Yasuhiko Hayashi,
• Hiroki Inukai,
• Tetsuo Soga,
• Shuichi Nakamura,
• Norio Shibata and
• Takeshi Toru

Beilstein J. Org. Chem. 2009, 5, No. 7, doi:10.3762/bjoc.5.7

• the electron-withdrawing nature of the (methoxycarbonyl)phenyl, cyanophenyl, nitrophenyl, (methylsulfonyl)phenyl, and (trifluoromethylsulfonyl)phenyl groups attached to the cyclopropane ring, enough to compensate the opposite effect of the electron-donating mono-, bis-, or tris(octyloxy)phenyl group

• -nitrophenyl, (methylsulfonyl)phenyl, and (trifluoromethylsulfonyl)phenyl groups, taking a P3HT:PCBM-blended cell as a reference, were examined. Table 2 shows the current density–voltage (J–V) characteristic parameters of the devices structured from P3HT:diarylmethanofullerene derivatives 1a–1k, 2 and

• work as acceptors, probably because of their low solubility in ODCB. The bis(methoxycarbonyl)phenyl- and cyanophenyl-substituted methanofullerenes 1f and 1g showed good PCE, whereas nitrophenyl-substituted methanofullerenes 1h and 1i did not work as acceptors. (Methoxycarbonyl)phenylmethano-C70

Reduction of arenediazonium salts by tetrakis(dimethylamino)ethylene (TDAE): Efficient formation of products derived from aryl radicals

• Mohan Mahesh,
• John A. Murphy,
• Franck LeStrat and
• Hans Peter Wessel

Beilstein J. Org. Chem. 2009, 5, No. 1, doi:10.3762/bjoc.5.1

• %; (d) N-(2-nitrophenyl)methanesulfonamide (25a), DIAD, PPh3, THF, 0 °C to r.t., 1 h, 98%; (e) TBAF, THF, r.t., 20 min, 90%; (f) NBS, PPh3, CH2Cl2, −25 °C, 20 min, then 37, −25 °C to r.t., 40 min, 96%; (g) PhSH, NaH, THF, 0 °C to r.t., 1 h, then 38, r.t., 12 h, 86%; (h) NaIO4, H2O, MeOH, r.t., 76 h, 73

The role of an aromatic group in remote chiral induction during conjugate addition of α-sulfonylallylic carbanions to ethyl crotonate

• Shlomo Levinger,
• Ranjeet Nair and
• Alfred Hassner

Beilstein J. Org. Chem. 2008, 4, No. 32, doi:10.3762/bjoc.4.32

• cyanoborohydride in an acidic medium. Phenyl-, (4-nitrophenyl)- and (1-naphthyl)ethylamines 6a, c, e are commercial. Interestingly, the 9-anthryl nucleus in both primary amine 6h and its allyl sulfone congener 1h shows a peculiar 1H NMR spectrum: a broad signal representing both protons 1 and 8 in the first

New acylides: synthesis of 3-O-[γ-(4-oxo-2-aryl- thiazolidin- 3-yl)butyryl]erythromycin A derivatives

• Deepa Pandey,
• Wahajul Haq and
• Seturam B. Katti

Beilstein J. Org. Chem. 2008, 4, No. 14, doi:10.3762/bjoc.4.14

• -aryl-thiazolidin-3-yl)butyryl]-6-O-methylerythromycin A derivatives 4a–f (Method A); R = 4a: phenyl, 4b: 4-chlorophenyl, 4c: 4-fluorophenyl, 4d: 4-methoxyphenyl, 4e: 4-nitrophenyl and 4f: 4-quinolyl. Synthesis of 3-O-[γ-(4-oxo-2-aryl-thiazolidin-3-yl)butyryl]erythromycin A derivatives 4a–f (Method B

Microwave assisted synthesis of triazoloquinazolinones and benzimidazoquinazolinones

• Aboul-Fetouh E. Mourad,
• Ashraf A. Aly,
• Hassan H. Farag and
• Eman A. Beshr

Beilstein J. Org. Chem. 2007, 3, No. 11, doi:10.1186/1860-5397-3-11

• ] Other triazoloquinazolines were obtained from 2'-azidoacetophenone and as well as 2-azidobenzonitrile. [11] Quinazolines were also obtained in moderate yields by an intermolecular reductive N-heterocyclization of 2-nitro-benzaldehydes or 2-nitrophenyl ketones with formamide catalyzed by a combination of

The Elbs and Boyland- Sims peroxydisulfate oxidations

• E. J. Behrman

Beilstein J. Org. Chem. 2006, 2, No. 22, doi:10.1186/1860-5397-2-22

• , although they obtained evidence for a peroxide, isolated only phenol (in substantial yield). Heller and Weiler [18] investigated a more stable analog, namely p-nitrophenyl hydroperoxide formed by ipso displacement of a nitro group from p-dinitrobenzene by the hydrogen peroxide anion.p-Nitrophenyl

Asymmetric aza-Diels- Alder reaction of Danishefsky's diene with imines in a chiral reaction medium

• Bruce Pégot,
• Olivier Nguyen Van Buu,
• Didier Gori and
• Giang Vo-Thanh

Beilstein J. Org. Chem. 2006, 2, No. 18, doi:10.1186/1860-5397-2-18

• was observed in the case of p-nitrophenyl (Table 3, entry 4, R = p-NO2C6H4,). This is due to hydrogen bond formation between the OH group of the chiral ionic liquid and the NO2 function of the substrate. A similar decrease in asymmetric induction was observed by our group in the mechanistically