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czjdingyi(½ð±Ò+43,VIP+0):Thank you very much! 12-12 11:42
chemistryer(½ð±Ò+1,VIP+0):¹ÄÀø½»Á÷ 12-13 20:46
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(i) H2O, ion-exchange resin , (ii) phenothiazine, xylene; Multistep reaction;    Otsubo,T. et al.
Synthetic Communications,   1976 ,  vol.  6,  p. 591 - 596
Full Text      

  
    With  sodium hydroxide

  Show Experimental Procedure
Montedison S.p.A.
Patent:   US4675462 , 1987
Title/Abstract      Full Text      

EXAMPLE 1 (Comparative Test)
Into a 1,000 ml flask equipped with a stirrer, a thermometer and a condenser, there were charged:
100 g of an aqueous solution containing 40percent by weight of NaOH (1 mole), and
62.5 g of an aqueous solution at 63.9percent by weight of p-methylbenzyltrimethylammonium chloride (0.2 moles).
Under continuous stirring, the solution was heated by gradually raising the temperature from 22.deg. C. to 120.deg. C.
The NaOH concentration was maintained at 35percent by weight.
The solution was maintained at the boiling temperature for 5 hours.
The resulting (2,2)-paracyclophane was separated from the reaction mass by solubilization in 300 ml of xylene.
To this purpose, xylene was added to the reaction mass and the slurry was maintained at total reflux under stirring for 0.5 hour.
It was filtered at 95.deg. C., the aqueous phase was separated from the organic solution which was repeatedly washed with water and concentrated to small volume.

  
    With  sodium hydroxide

  Show Experimental Procedure
Montedison S.p.A.
Patent:   US4795838 , 1989
Title/Abstract      Full Text        


With  iodized misch metal in  tetrahydrofuran
1 h; Ambient temperature other metals investigated; Product distribution;
   Takahashi, Senji; Mori, Nobuo
Chemistry Letters,   1989 ,  p. 13 - 14
Title/Abstract      Full Text      

  
  22.2%  With  iodized misch metal in  tetrahydrofuran
1 h; Ambient temperature;
   Takahashi, Senji; Mori, Nobuo
Chemistry Letters,   1989 ,  p. 13 - 14
Title/Abstract      Full Text      

  
    Multi-step reaction with 2 steps
1: 73 percent / NaBH4 / ethanol; tetrahydrofuran / 20 h / 40 ¡ãC
2: 1.) isoamyl nitrite, anthranilic acid, 2.) Raney Ni, H2 / 1.) 1,2-dichloroethane, reflux, 4h, 2.) ethanol, reflux, 17-23 h
  View Scheme
Higuchi, Hiroyuki; Misumi, Soichi
Tetrahedron Letters,   1982 ,  vol.  23,  # 52   p. 5571 - 5574
Title/Abstract      Full Text       View citing articles

Chow, Hak-Fun; Low, Kam-Hung; Wong, King Y.
Synlett,   2005 ,  # 14   p. 2130 - 2134

Trahanovsky, Walter S.; Lorimor, Steven P.
Journal of Organic Chemistry,   2006 ,  vol.  71,  # 5   p. 1784 - 1794
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