Contents:
PTC Tip of the Month, PTC Training PT Catalyst of the Month, PTC Reaction of the Month,
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inconvenience.
PTC Tip
of the Month - Generics
and PTC: A Perfect Fit & Strategic Opportunity
What is the #1 key to generic pharmaceuticals and agrochemicals? LOW
COST! Phase-Transfer Catalysis provides low-cost and high-performance
processes for thousands of reactions in 40 categories, almost all of which are
extremely common in pharma and ag. Can PTC provide your company with a cost
advantage, even in the US, Europe or Japan? YES. Although low cost is typically
associated with low labor cost, even low labor cost can’t fully compensate for
inefficient raw material usage and other process imperfections. Question: Do you
think that a 95% yield using PTC and NaOH for a key intermediate produced in
YOUR plant, could compete with an 80% yield using NaOMe without PTC for the same
intermediate produced in China? Reaction time may not be so
important in China, but yield and raw material costs are!
Since 1998, NCE’s have drastically decreased in pharma (52 down to 17) and ag.
Your company may have considered a strategic shift to generics - A RARE GROWTH
MARKET – and then rejected generics due to low labor cost competition. You may
want to reconsider, because regardless of your company’s status, PTC IS A
PERFECT FIT FOR GENERICS, possibly providing the key competitive advantage. Generics require low cost
organic chemical processes. PTC technology delivers low cost organic chemical
processes. Any questions?
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Top PTC Resources |
PTC
Training
|
PTC
Training - Save
$100 with early registration by March 1
The 2-day course "Practical
Phase-Transfer Catalysis" will be conducted in three locations in 2004.
Click here
for agenda. Click here
for registration or contact us by E-mail,
website, telephone (+1
856-222-1146) or fax (+1 856-222-1124).
May 3-4, 2004 - Mt. Laurel, New
Jersey (near PTC Organics) Early
registration - save $100
May 2004 - Midland, Michigan
date to be announced - for details call +1 856-222-1146
Anytime - private
in-house course (optional Opportunity Identification Session under secrecy
agreement)
PT
Catalyst of the Month - Benzyl
Triethyl Ammonium Chloride ("BTEAC" or "TEBA")
Advantages
Inexpensive; high reactivity reported in many literature references by Makosza
for PTC-NaOH applications; very easy catalyst separation by extraction into
water. Also called "TEBA," this catalyst usually induces high enough
reactivity for substrates with pKa 16-23 before decomposing. Historically, a
popular catalyst in the 1960's and 1970's.
Disadvantages
Stability is quite low in the presence of strong base due to Hofmann elimination
(3 susceptible ethyl groups) and stability is low in the presence of
nucleophiles due to substitution of the benzyl group. In fact, you must be very
aware of the possibility of forming benzylated impurities of your substrate.
Very hygroscopic (makes a puddle in lab balances within ~ 30 seconds). Note:
TEBA often works faster than it decomposes, so it may be OK.
Reactivity
Parameters (Contact
PTC Organics for explanation)
Organophilicity
C# = 13; Accessibility q-value = 1.6; benzyl group behaves more like a butyl
group for C# and q-value
Availability, Samples and Quotes from Competitors
Request samples and quotes from: Delta
Finochem, Dishman
Pharmaceuticals & Chemicals, Lion
Akzo, Nehachem,
SACHEM
(click on link)
PTC Reaction of the Month - Answer
to Etherification Challenge from October
Thank you to the readers who submitted the process improvements for the
application below. You will receive your complimentary CD-ROM "The Best of
Industrial Phase-Transfer Catalysis" shortly. The answers included (in
order of importance): [1] do not purchase solid NaOMe, rather use a mixture of
MeOH and NaOH to form NaOMe in-situ. The phase-transfer catalyst will
selectively transfer and activate the methoxide over the hydroxide. [2] Use the
minimum equivalents of in-situ methoxide (probably don't need 4 equiv). [3] Use
less solvent, or no solvent if above b.p. of product or some excess MeOH as
solvent. [4] Although catalyst loading is low, it was suggested to use a less expensive phase-transfer catalyst which is easier
to separate from the product or possibly recycle (for cases with higher catalyst
usage).
Production Costs Too High?
Competitive Market?
Increase Yield: Could
a 5-10% yield increase significantly increase profit (e.g., is your current
yield < 88%)?
Reduce Cycle Time:
Does your current process take > 8 hours?
Want to eliminate isolation of intermediates?
Replace Strong Base
with NaOH: Are you using alkoxides
(e.g., methylate, t-butoxide), Na hydride, Na amide?
Improve Selectivity:
Do you need to improve product assay or
simplify workup? Too much hydrolysis?
Reduce Excess Reactants:
Are you using > 10% excess of any
expensive and/or hazardous reactant?
Replace Solvent for
Easier Workup: Are you using DMSO,
NMP, DMF, DMAC or undesirable solvent?
Increase Reactor
Volume Efficiency: Does solvent
and/or water take up > 50% of your reactor volume?
Other Challenges:
Competing with China and India? Too much waste?
Working with water-sensitive
compounds?
If you answered "Yes" to even one question
above and your
reaction type is one of 35 on the
PTC Reaction
list, then Phase-Transfer Catalysis may help you achieve BREAKTHROUGH process
improvement and improve profit margin and competitiveness.
INQUIRY: Contact Marc
Halpern at PTC Organics by E-mail,
website, telephone (+1
856-222-1146) or fax (+1 856-222-1124) to inquire about using PTC to improve
process performance.
As the world leader in industrial
phase-transfer catalysis, PTC Organics offers PTC
Breakthrough Process Screening for rapid and highly effective evaluation of
breakthrough high-performance low-cost phase-transfer catalysis processes.
Conferences
- Meet PTC Organics
Informex 2004 - January
19-22, 2004 in Las Vegas, Nevada, USA. PTC Organics booth # will be 2206.
2-Day PTC Course - public PTC courses in May 2004. Register
early and save $100.
PTC Organics is a member of SOCMA
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Before
performing any PTC reactions read this important message
Organic chemical reactions are inherently dangerous. Moreover, phase-transfer
catalysis may provide rate and other enhancements which can intensify associated
hazards. Under no circumstances should anyone perform any procedure on any scale
based in whole or in part on any of the contents of this information provided
here before
thoroughly establishing safe operating procedures and performing a full and
competent hazardous operations analysis with the participation of qualified
technical personal trained in chemical, engineering, safety, industrial hygiene
and environmental disciplines and sciences.
Policy
The list of PTC Tip of the Month subscribers
will not be sold, rented or transferred and will be used only by PTC
Communications, Inc. and PTC Organics, Inc. to provide information related to
Phase-Transfer Catalysis. PTC Communications, Inc. reserves the right to
distribute the PTC Tip of the Month to selected industrial chemists, engineers and
managers.
PTC Tip of the Month #15 - December 2003
Copyright 2003 PTC Communications, Inc.
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